Since I wanted to know which bloodline enables which sword and I couldn't find the information here, I decided to look it up in the mod files and just share my findings in case anyone else is looking for this.

Sword of Mars

• Amalings
  
• Alaric
  
• Erchinoald

Legbiter

• Ivar
  
• Halfdan
  
• Yngvi-Frey

Sword of Mercy

• Ingelder
  
• Cerdic

Grus

• Gut and Kelad

Szczerbiec

• Draculesti
  
• Dulo
  
• Samo

Joyeuse

• Charlemagne
  
• Merovech
  
• Hugh Capet

Tizona

• Vela
  
• El Cid Campeador

Lobera

• Anscar
  
• Bello

Coloda

• Jimeno
  
• Vimara Peres
  
• Beni Alfons
  
• Inigo Arista

The Wallace Sword

• Flaad
  
• Bruce
  
• Findláech

Caladcholg

• Milesius
  
• Fergus

Carnwennan

• Glywys
  
• Cunedda

Claidheamh Soluis

• King Coel
  
• Eogan

Durandal

• Conan
  
• King Alan
  
• Rollo

Gram

• Theophylact
  
• Scaligers
  
• Ahalolfings

Kladenets

• Rurik

Crocea Mors

• Romans
  
• Gens Fabia
  
• Solomon
  
• Basil
  
• Constantine

Curtana

• Guthrum

The Imperial Sword

• Staufer
  
• Huosi
  
• Hunfrid
  
• Otton
  
• Conradines
  
• Welf
  
• Etichons

Tur Ketsakin

• Arsaces
  
• Kayitag
  
• Bagrat

Dhu al-Fiqar (Requires Vanilla traits, no blood lines)

• Sayyid
  
• Mirza