What were the names of Abraham's 12 children?

Abraham had 8 sons altogether.

Abraham had one son by Hagar, Sarah's Egyptian slave girl, named Ishmael.

Abraham had one son by Sarah named Isaac.

Abraham took another wife after Sarah died - Genesis 25 - named Keturah

Abraham had six sons with Keturah: Zimran, Jokshan, Medan, Midian, Ishbak, Shuah