Giloh was a city in Judah. The biblical town has been identified with Beit Jala.
Ahitophel, one of King David's chief advisors, came from Giloh (Joshua 15:51; cf. 2 Samuel 15:12). Ahitophel was the grandfather of Bathsheba, "a daughter of Eliam", one of David's "thirty" (2 Samuel 23:34; cf. 1 Chronicles 3:5).
References
Giloh Wikipedia(Text) CC BY-SA