Euthydemus I was, according to Polybius a Magnesian Greek. His son, Demetrius, founder of the Indo-Greek kingdom, was therefore of Greek descent from his father at minimum. A marriage treaty was arranged for Demetrius with a daughter of Antiochus III the Great, who had partial Persian descent. The ethnicity of later Indo-Greek rulers is less clear. For example, Artemidoros Aniketos (80 BCE) may have been of Indo-Scythian descent. Intermarriage also occurred, as exemplified by Alexander the Great, who married Roxana of Bactria, or Seleucus I Nicator, who married Apama of Sogdia.