Si'um
Si'um, also Siium, or Sium was the 18th Gutian ruler of the Gutian Dynasty of Sumer mentioned on the "Sumerian King List". According to the SKL: Si'um was the successor of Yarlaganda. Sium was the last king of the Gutians before Tirigan.
A tablet is known, dated to c. 2130 BCE, mentioning the allegiance of Lugalanatum prince of Umma to Sium, King of the Gutians.
