Question: Who is the uncle of Antigonus I Monophthalmus?
Sentence (from "Philip (son of Machatas)"): Philip (died 325 BC), son of Machatas and brother of Harpalus, was an officer in the service of Alexander the Great, who in 327 BC was appointed by Alexander as satrap of India, including the provinces westward of the Hydaspes, as far south as the junction of the Indus with the Acesines.
Relevant evidence: Yes