Abraham had taken another wife whose name was Keturah.

Midian's sons were Ephah, Epher, Hanoch, Abida, and Eldaah. All of these were Keturah's descendants.

Here's a list of the names of Ishmael's sons, recorded by their names and descendants: Nebaioth was the firstborn, followed by Kedar, Adbeel, Mibsam,