UMAR, Umar ibni Khattob (581 b 591, Makka— 3 b 4. 11. 644, Madina), khalifa (az 634), yake az namoyontarin hamsafoni Muhammad.
Dar ahdi Umar qushunhoi arabho hududi ziyodi Osiyo va Afrikaro zabt namudand. Umar dar mamlakathoi ishgolkardaash voligiho barpo namud. Idorahoi harbi va grajdanii voliho, sud ba vujud omadand, lashkargohho tasis gardida, minbad onho ba shahrhoi Kufa, Basra va Fustat tabdil yoftand.
Umar solshumorii hijrii musulmoniro jori kard. Az tarafi gulome kushta shud.