Boyd’s Bible Dictionary:
(light, region). (1) Place where Abraham lived with his father Terah and his wife Sarah, before they started for the land of Canaan (Gen. 11:28,31). Mentioned in Genesis 15:7, as of the Chaldees, and Acts 7:2, as in Mesopotamia. (2) Father of Eliphal, one of David’s guard (1 Chron. 11:35). Called Ahasbai (2 Sam. 23:34).
Concise Bible Dictionary:
Father of Eliphal one of David's mighty men (1 Chron. 11:35).
Strong’s Dictionary of Hebrew Words:
Meaning:
the same as 217; Ur, a place in Chaldaea; also an Israelite
Potts’ Bible Proper Names:
Light; fire:―a place in Chaldaea; father of Eliphal, Gen. 11:28. {Lux}