Umar or Omar is a common name (Arabic: عمر) in Arabic-speaking and Muslim populations in general.

The name dates back to the emergence and military success of Islam, which were partly due to the second caliph Umar ibn al-Khattab (also spelled Omar, r. 634–644).

The name Ómar also became popular as a man's name in Iceland, and to a much lesser extent in Nordic countries.

[citation needed] The name Omaar (أومار) is a Somali name, not a variant of Omar/Umar.

It comes from the Somali word Oomaar which means 'hot steam from boiling pot'.