Abishai

Abishai may refer to:
 * Abishai (biblical figure), the eldest son of Zeruiah, King David's sister
 * Abishai, a Semitic chief who offered gifts to the Lord of Beni-Hasan according to an inscription in Middle Egypt.
 * Abishai (Dungeons & Dragons), a type of monster in Dungeons & Dragons
 * Avishai (given name)