Sihon means in the bible: King of the Amorites, seized the Moabites Num. 21:26-30, conquered 21:21-35 by Moses; Deut. 1:4; 2:26-37; 3:2; Josh. 9:10; 12:2; 13:10, 21; Judg. 11:19-22; Neh. 9:22; Ps. Ps. 32:33; Josh. 2:10; 1 Kgs. 4:19, referred to as the nation from which Jer was rescued by the Moab conquerors. 48:45.
(in Bible Dictionary)