(Κτήσιος), the protector of property, occurs as a surname of Zeus at Phlyus, and of Hermes. (Athen. 11.473; Paus. 1.31.2.) Ctesius occurs also as a proper name. (Hom. Od. 15.413.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890