|Int. Standard Bible Encyclopedia|
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.
Ben-oni (1 Occurrence)
Genesis 35:18 And it came to pass, as her soul was departing ( for she died ), that she called his name Ben-oni: but his father called him Benjamin. (ASV BBE JPS WBS YLT NAS NIV)