BEN-ONI

ben-o'-ni (ben-'oni; huios odunes mou, "son of my sorrow"): The name given by the dying Rachel to her new-born son; changed by his father Jacob to BENJAMIN (Genesis 35:18) which see.

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.