For House Dayne they already have one legacy, but for the others...

"Since the Dawn of Days" (Based on the ancient pedigree of their house) +1 prestige per month and a +1 vassal limit.

"Legacy of Starfire" (Based on Samwell Dayne "Starfire" sacking of Oldtown) that could give an increase to siege progression and +1 martial bonus.

"As Bright as Stars" (Based on the fact that many Daynes out of those known were described as attactive, Ashara, Gerold, Davos, Clarisse) +5 attraction opinion, +5 court grandeur and make the attractive traits more likely.

"Swords of Morning and Evening" (Based on Vorian Dayne the Sword of the Evening and the various Swords of the Morning being some of the greatest knights ever of Dorne) that could give one prowess for every level of prestige, +martial lifestyle experience and an attacker advantage.

And for a building I forget if the Palestone Sword Tower is in, but if not then that.

Just a quick list, made each thinking of separate themes so they may fit your way of updating the mod:
Rivals of the Ironwood: Forrester and Whitehill
The Vanquished: Tarbeck and Reyne (¿Rather Vikary?)
Unruly Bannermen: Florents, Frey and Bolton (¿Maybe also Yronwood?)
I must say i'm impressed with the work you have put in this, already a must have submod for me, thanks for your hard work :)

House Manderly legacy ideas:

Wardens of the White Knife

Stewardship and/or martial lifestyle experience
Coastal Holding tax and/or flat tax
Popular opinion
Men-at-Arms (river Runners Light Infantry with forest and wetlands bonus or White Harbour Watch Spear/Crossbow with urban terrain bonus)
Chance for Diligent

#A title the Manderlys use
#They created their own city after arriving in the North, and are the richest Northern House
#White Harbour is considered clean and orderly
#White Harbour has Silversmiths and amazing Ale as important exports
#They protect smallfolk from along the White knife and the Hornwood Lands in the old Mint
#Wyman Manderly seems like a very active Ruler (Fortifying White Harbour, Proposing to build Ships and Mint Coins, building the ships in secret, fighting for the Hornwood lands…)
#Torrhen Manderly was considered a very able hand of the King
Sources F&B Lysene Spring, ACOK Bran II/III, ADWD Davos II-IV,

Lamprey Pies

Hostile scheme success and/or defence chance
Feast cooldown reduction (Like frequent festivities Tradition)
Chance for Gluttonous (it is an okay trait with their culinary artists tradition, also balance)

#Wyman Manderly is called “Lord Lamprey”
#Basically all male Manderlys are considered at least “stout”, most are “immense”
#They take their food seriously, not so easy to poison
#Frey Pies

Defenders of the Dispossessed

Better Invite Knights (Like the Recognition of Talent Tradition)
Guest recruitment cost reduction
Guest Opinion

#A Title the Manderlys use
#Their heritage of exile makes them sympathetic to exiled people themselves, for example Torrhen Manderly takes in the famous/infamous Court Fool Mushroom
#They keep the “Order of the green hand” alive, so knights will probably want to go there
Sources F&B Lysene Spring, ADWD Davos III

The Mermans Court

1 Diplo 1 Intrigue
Marriage acceptance with other cultures (or religions if that is possible)
Fellow vassal opinion and/or a free alliance

#Multiple known Stark-Manderly matches and Manderly-Hornwood, while it is basically impossible in game to get marriages with other northern houses because of the different religion
#Multiple planned marriage pacts with the Targaryens
#Wyman Claims that Houses Locke and Flint of Widows Watch take their lead from House Manderly, even tough they are not vassals, at least one Locke is Present when Davos is in the Mermans Court

Shields of the Faith

Head of Faith Opinion
Clergy Opinion
Piety
Knight Effectiveness

#A title the Manderlys use
#The bastion of Knighthood in the North

First of all, thanks for the work and your mod!!

Here are my suggestions for houses I find interesting and some ideas for traits they could have:

-House Umber, loyal Vassals to the Starks and powerfull warriors.
Giantsblood Trait: Giant and Herculean more likley, higher prowess
Umber Berserker Infantry (heavy infantry unit)
Martial bonus, Wrathful trait more likley

-Hous Mallister, a proud and powerful House, said to have a more noble Heritage than their liege Lords, the Tullys. The Mallisters defend the coast of the Riverlands since generations agianst ironborn Invasion.

Guardians of the Egale Cape: special infantry unit, reduced cost for coastal buildings, reduced cost for embarking
Pride of Seaguard: Bonus to prestige gain, higher opinion, higer diplomacy expierience gain
The Bell Tower: Special building, a strong castle


-House Corbray, known for many famous and above all deadly knights that trace the History of the family.

Bonus to prowess and martial

These are the Houses I find interesting and some random thoughts about content for them.

One house I'd love to see have more attention is Oldflowers, last remaining members of the direct Gardener Dynasty due to being a bastard branch hinted at with the name "flowers".


Legacy ideas that I have for the Gardener Dynasty would be

Green Seedlings :
# Same as house Rowan and house Tarly they are descendants of Garth Greenhand though his direct line instead (or bastard in case of Oldflowers)

Legacy of Garth the Gardener :
# Gardener trait more likely
# -10% Building and Holding Construction Time
# -10% Building and Holding Gold Cost
# Defender Advantage +5
# +10 House Opinion
# -10 Opinion of Liege
(Garth the Gardener built Highgarden as both a prosperous palace but first and foremost a fortress against the Ironborn and Dornish, the opinion modifiers reflect the history of the Gardener Kings with the house being tightly knit and remembering when they ruled)

First Man :
# Old Gods Opinion +10
# Chance of Greenseer trait
(Reflecting the myths surrounding Garth Greenhand being either the First Human of Westeros or the High King of the Firstmen)

Peaceful Conquest :
# Diplomacy +2
# Marriage Acceptance +20
# Marriage Acceptance for Close Family and Extended Family +10
(House Gardener took the Reach not through conquests of blood but through marriages and alliances, uniting the houses against outsiders not weakening them through war)

Green Thumbs, Green Seat :
# Unlocks the decision to grow a new Oakenseat for House Gardener
(Oakenseat was the famous living throne of the Gardener kings grown by Garth the Gardener until it was destroyed by the Dornish)

Living Throne Regrown Decision :
# Must be part of House Gardener not just dynasty (House Oldflowers have a decision already to switch to it), must control Highgarden county, duchy and the Reach (kingdom) and must have the gardener and greenseer traits.
# The decision would add a unique duchy building to Highgarden with bonuses focussed on the prosperity of the realm (Would replace any Duchy Building already built there, and would be similar to the walls of Rome and Constantinople in the base game)

Whitehand Keep Grotto Special Building :
# -10% Stress Gain
# +10% Stress Loss
# +10% Hostile Scheme Resistance
(Castle Whitehand was built above a spring by Garth Flowers bastard of King Mern VII for its freshwater, due to his shy nature and his status as a king's bastard Garth the lord often went to the cave housing the spring to avoid people and plots. This practice continued with his descendents and slowly they expanded it into a small grotto with stone seats carved into the rocks and candles to light it.)

The background to the Dynasty Legacies could use the new Highgarden loading screen.
Sorry for the long suggestion hopefully it proves useful if ever you head back to the reach with minor houses.

House Ironwood from the GOT Telltale game

House Dayne from the books (Ashara and Arthur Dayne being at Harrenhal also)

House Dustin from A Dance with Dragons (Barbery Dustin being a character)

House Stout from A Dance with Dragons (Harwood Stout, being a one armed character)

House Connington from the Harrenhal lore. (Jon Connington)

House Whent from the Harrenhal lore (Walter Whent and Oswell Whent)

House Royce from the Harrenhal lore ("Bronze" Yohn Royce)

House Hunter

House Lonmouth

House Haigh

House Blount

@Magnus btw, both southron old gods and more faiths of the seven are abandoned and would be complimentary to your mods. They are the mods I missed the most along with yours. Thanks for updating!
For Dornish houses, Uller, Dayne, Yronwood, Fowler would be good. Fowler v Yronwood rivalry
The Reach, Redwyne, Hightower, Oakheart and Crane. All the houses that traces back to Garth Greenhand with shared legacies maybe. Redwyne v Velaryon rivalry is also a stretch but there. Hightower can have an interesting banking related legacy(Bank of Oldtown) And Hightower v Greyjoy rivalry is possible.
https://awoiaf.westeros.org/index.php/Garth_Greenhand for legacy inspiration for mainly Reach houses.

A legacy that enables better marriage acceptance and better opinion of female rulers would be good for House Florent. And intelligence bonus or a house trait
More tax legacy from trade for House Redwyne. Redwyne fleet/ port special building. More tax, more diplomatic range and a bonus to orchards and manor houses. Faster and cheaper embarks

@Labrys
Good timing with your suggestion, new update pushed now with content for House Dayne, Wyl, Yronwood and Uller.

I think its a shame no dorne content centered on the greenblood was made. The other stuff in dorne is dope as ♥♥♥♥

I have some ideas for some decisions you can add for houses. For House Celtigar could you add two decisions for them. First would be a decision to form the Kingdom of the Claw by holding the duchies of Claw Isle, Crackclaw point, and Rooks rest. Also a decision to become High Valyrian if your character reaches a certain prestige, has a high valyrian parent, and knows the valyrian langauge. For House Tarly, when your heir becomes an adult you could add a decision that makes him go on a stag hunt to prove his worth. This could add prestige, renown, and maybe a prowess boost on success and a chance of injury, death, stress, and presige loss on failure. For House Velaryon a cool event idea could be going on a voyage like Corlys and Alyn Velaryon. You could select from a few places such as free cities, Qarth, Yi-Ti, and Asshai which would have progressively greater treasures and danger. You could make the decision every 10 years and you would have an event chain of choices and as rewards you could get a lot of gold and maybe some artifacts. House Bolton could have an event where they can flay prisoners and get an artifact out of it, dread gain, and tyranny gain (also if you could add a Valyrian steel flaying knife that would be awesome). Finally it would be great to add a decision for House Royce to create a set of Runic Armor.

If you return to the Vale at all, I think Hunter, Waynwood, Redfort, and especially Corbray, being either Lords Declarant houses or Corbray's influence post-Dance. Could have a focus for the Corbrays on regaining the dominance of the Fingers.

Figuring that the next update will be the Stormlands, Dondarrion, Tarth, Connington, and maybe Estermont or Mertyns could be a good starting group. The first for Beric and the middle two for their POV characters can easily be a treasure trove of options. Estermont could maybe be a sea focused house with interest in the Stepstones, while the Mertyns could have learning xp and forest buffs.

@Sol Invictus
I'd still like to do more stuff in Dorne, so that's not off the table.

@Highground
Really like both the Kingdom-tier title decision for Celtigar idea, and the Velaryon voyage idea. I'll jot both of those down as possible future additions. I actually made a decision for house Royce to forge Runic Armor when the submod first was released, but never got really satisfied with how it turned out. I might look at it a second time the next time the submod revisits the Vale.

@The Damp Rag
I definitely would like to do more houses in the Vale at some point. The once that've gotten content so far are a bit cramped in one spot, so Corbray would be a top candidate. I also really like Redfort, even though their also kind of cramped in the same spot as the previously given content houses.

Awesome submod! Hope to see House Mallister and House Dondarrion in the future. Both are extremely awesome (in my opinion at least) minor houses.

Thank you for creating this mod it adds so much life to the game as for your next houses since i guess you would be working on The Stormlands and The Iron Isles would it be possible for you to take these houses into consideration
Stormlands- House Connington some legacy ideas, Descendants of Alyn Connington, also known as the Pale Griffin where member's of the house are more likely to join the Kingsguard giving martial and prowess boost,
House Tarth- Since Ancestors of House Tarth were once kings, and the head of the family is known as the Evenstar, also a legacy could be something to do with Ser Duncan the Tall since there has been hints Brienne is descended from him
The Iron Isles- House Harlaw and House Blacktyde as i can see you get your MAA inspirations from https://asoiaf.cmon.com/product/house-greyjoy which gives you two potential MAA House Harlaw Reapers/The Blacktyde Chosen also both houses having history of having some driftwood kings in thier dynasty

@13thcross
Thank you! I agree, Mallister is on my todo list when I eventually circle back to the Riverlands again, and I'd hard pressed to avoid doing the Dondarrions when I get around to the Stormlands. High chance for both of those houses getting something at some point in the future.

@RS Kovah
Glad you like it! I'll take them all into consideration. Several of those houses are already on my todo list.