Padan Aram ("Plain of Aram") was the Hebrew name for a region in Aram otherwise known as Aram-naharaim ("Aram of the two rivers"). This place is simply called "Mesopotamia" (Gr: "Between the rivers") in some translations. The town of Haran, where Terah died and from which Abraham ventured towards Canaan, is located here.
When Abram and Lot, with their households, left Haran, Abram's brother stayed behind. From the family estate there, wives were acquired for both Isaac and Jacob