Jeshishai
The name Jeshishai means “ancient; rejoicing exceedingly”.
Smith's Bible Dictionary 1863
(descended from an old man), one of the ancestors of the Gadites who dwelt in Gilead. (1 Chronicles 5:14)
International Standard Bible Encyclopedia 1915
je-shish'-a-i (yeshishay, "aged"): A Gadite chief (and family?) (1Ch 5:14).