One of the three giant Anakim brothers whom Caleb and the spies saw in Mount Hebron (Num. 13:22) when they went in to explore the land. They were afterwards driven out and slain (Josh. 15:14; Judg. 1:10).
Num.13: And they ascended by the south, and came unto Hebron; where Ahiman,Sheshai, and Talmai, the children of Anak, were. (Now Hebron was built seven years before Zoan in Egypt.)
Judg.1: And Judah went against the Canaanites that dwelt in Hebron: (now the name of Hebron before was Kirjath-arba:) and they slew Sheshai, and Ahiman, and Talmai.