According to the Bible and the Quran, Lot (Arabic: لوط, '; "Hidden, covered") was the nephew and brother in law of the patriarch, Abraham or Abram. He was the son of Abraham's brother Haran. (Gen. 11:27) Abram became Lot's brother in law by the marriage of Nahor (Abraham's brother) to Milcah (Lot's sister). Wikipedia
The definitive Wikipedia entry for Lot. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Lot_%28Bible%29