character Euchrous Mitylenaios, named character, command 0, influence 0, management 0, subterfuge 0, age 38, , x 154, y 113
traits NaturalIntelligence 3 , NaturalCharisma 4 , NaturalEnergy 2 , Temperament 3 , Selflessness 1 , Loyalty 2 , TurnsAlive 2 , MakedonianHellen 1 , Type4Governor 2 , YearsPassed 4 , NumAncillariesAcquired 2
ancillaries treasurer, veteran

Make sure he has the "Type4Governor 2" thing. He's a client ruler. If he doesn't have that the game may try to read him as a family member but can't since he's not on the family tree.