KTESIOS (or Ctesius) was the spirit (daimon) protector of house and property. Both Ktesios and Soter (father of Ktesios) were also cult titles of the god Zeus.
Suidas s.v. Praxidike (trans. Suda On Line) (Byzantine Greek Lexicon C10th A.D.) :
"Praxidike (Exacter of Justice): A deity whose head alone is venerated. Mnaseas [Greek C2nd B.C.] in his treatise On Europe says that Soter (Saviour) and his sister Praxidike (Exacter of Justice) had a son Ktesios (Household) and daughters Homonoia and Arete, who were called Praxidikai (Exacters of Penalties) after their mother."
- Suidas - Byzantine Greek Lexicon C10th A.D.