Si'um

{{Infobox royalty

| name = Si'um
{{cuneiform|𒋛𒅇𒌝}}

| title = King of Sumer

|image=File:Gutian_inscription-AO_4783-gradient.jpg

|caption=A Gutian inscription dated c. 2130 BCE. Lugalannatum prince of Umma ... built the E.GIDRU [Sceptre] Temple at Umma, buried his foundation deposit [and] regulated the orders. At that time, Siium was king of Gutum [or Qutum]." (Collection of the Louvre Museum.)

| reign = fl. late 3rd millennium BCE

| predecessor = Yarlaganda

| successor = Tirigan

| royal house = Gutian Dynasty of Sumer

}}

Si'um, also Siium, or Sium ({{cuneiform|𒋛𒅇𒌝}}, si-u-um, fl. late 3rd millennium BCE) was the 18th Gutian ruler of the Gutian Dynasty of Sumer mentioned on the "Sumerian King List" (SKL). According to the SKL, Si'um was the successor of Yarlaganda, and the last king of the Gutians before Tirigan."However, the last three Royal names of the Guti dynasty are again not Semitic. The last two among them are Sium and Tirikkan (Jacobsen, 1939)." in {{cite book |last1=Moisheson |first1=Boris |title=Armenoids in Prehistory |date=2001 |publisher=University Press of America |isbn=9780761817802 |page=141 |url=https://books.google.com/books?id=9NSAAAAAMAAJ |language=en}}

A tablet is known, dated to c. 2130 BCE, mentioning the allegiance of Lugalanatum prince of Umma to Sium, King of the Gutians."From a text recently found at Jokha we also know that Lugal-annatum, patesi of Umma, Lugalanatum patesi of Umma, owed allegiance to Sium, King of Guti" {{cite book |last1=Chisholm |first1=Hugh |title=The Britannica Year Book |date=1913 |publisher=Encyclopœdia Britannica Company, Limited |page=[https://archive.org/details/britannicayearb01chisgoog/page/n297 259] |url=https://archive.org/details/britannicayearb01chisgoog |language=en}}

File:Si-u-um (name).jpg|Name "Si-u-um" on the tablet, and corresponding standard Sumero-Akkadian cuneiform

File:Gutium_(name).jpg|Mention of the Gutian dynasty of Sumer in the tablet (last column: {{cuneiform|sux|𒄖𒋾𒌝𒆠}}, gu-ti-um^KI)

{{S-start}}

{{Succession box

| title = King of Sumer

| before = Yarlaganda

| after = Tirigan

| years = fl. late 3rd millennium BCE}}

{{S-end}}