Gigas and Sephirot - possible connection?

[Kotemon]

There's a Grand Company Leve "Who Writes history"

Notes: Gigas converge on the Crystal Tower, led by a firebrand calling himself Okeanos the Red. He incites the mob to take back Silvertear Falls, and reconsecrate the ruins of the Allagan Empire, from which he claims descent. Reunite Okeanos with his ancestors, and let any who stand in the way anoint the ground with hot fear and cold blood.

Remember there's another Fate or Guild Heist that describes the three giant factions as being part of some kind of social hierarchy that don't get along well with each other. Giant, Gigas, & Hecatoncheir (why is the spelling E>I instead of I>E?)