Extended Strong's Hebrew Lexicon (Brown-Driver-Briggs based)
Abishai
Usage: A man living at the time of United Monarchy, first mentioned at 1Sa.26.6 and Zeruiah (H6870); brother of: Joab (H3097) and Asahel (H6214) § Abishai = "my father is Jesse" or "my father is a gift" grandson of Jesse, nephew of David via his sister Zeruiah, brother of Joab