Mibsam was one of Ishmael's twelve sons and thus a grandson of Abraham. He is mentioned in the genealogies in Genesis and 1 Chronicles as one of the tribal princes among the Ishmaelites. Another name, Mibsam, also appears in the genealogy of Simeon in 1 Chronicles.
God had promised Abraham that Ishmael would become the father of twelve princes and grow into a great nation, which was fulfilled through Mibsam and his brothers.
20As for Ishmael, I have heard you. I will surely bless him; I will make him fruitful and multiply him greatly. He will father twelve princes, and I will make him into a great nation.
A name Mibsam also appears in the tribal genealogy of Simeon in 1 Chronicles, as a son of Shallum, which may suggest cultural influence or a shared name.