Haran (Terah's son)'s child.
Genesis 11:27This is the genealogy of Terah: Terah became the father of Abram, Nahor and Haran. And Haran became the father of Lot.Genesis 11:28While his father Terah was still alive, Haran died in Ur of the Chaldeans, in the land of his birth.Genesis 11:29Abram and Nahor both married. The name of Abram’s wife was Sarai, and the name of Nahor’s wife was Milcah; she was the daughter of Haran, the father of both Milcah and Iscah.Genesis 11:30Sarai was childless because she was not able to conceive.Genesis 11:31Terah took his son Abram, his grandson Lot son of Haran, and his daughter-in-law Sarai, the wife of his son Abram, and together they set out from Ur of the Chaldeans to go to Canaan. But when they came to Haran, they settled there.
[See Abraham's family tree]