Warframe

Warframe

ION | Nekros Helmet
Wild Enigma Guess
Going to go with "Osiris"

Egyptian lord of the underworld (along thhe lines of Nekros)
Taking thhe 52 hint as 5th Dynasty having most information on him, and having 2 offspring (Horus and Anubis)
The design of the top of the helm itself could also be an abstract version of his Atef crown.