Who was Eliezer (i.e. servant of Avraham) father?
The Torah just introduces him as a Damascene.
But I believe one medrish identifies him as Nimrod's son. Eliezer was tired of his father's worldview and sought out Avraham's monotheism.
According to Targum Yonoson - 14:14 (in Bereishis), Eliezer's father was Nimrod.
Another Midrash (Bereishis Rabbah 60:7) identifies Eliezer with Canaan. According to that, then, his father would have been Ham, Noach's son (Gen. 10:6).
Pirkei d'Rebbi Eliezer has Eliezer as Og King of the Bashan.