Second successor ( caliph) to Muhammad (and a father-in-law). Sometimes called the "St. Paul" of Islam because of his sudden conversion and his success in spreading the message (including militarily).

the second Muslim Caliph and first Prince of the believers.

Umar (Arabic: )is an Arabic name, most commonly transliterated as "Umar". It is also sometimes transliterated as "Omar" or "Umro". The word is derived from the tri-consonant Arabic word for "life" and could possibly mean "living" or something similar and the name itself means firstborn, disciple or famous..

Umar ibn al-Khattāb (in Arabic, عمر بن الخطاب) (c. 580 – august 7, 644), sometimes referred by Sunni Muslims as `Umar al-FarÅ«q (Umar the Distinguisher (between Truth and Falsehood)), also known in English as Omar or Umar, was from the Banu Adi clan of the Quraysh tribe. He was a companion of Muhammad and became the second Caliph (634 – 644) following the death of Abu Bakr, the first Caliph.

Umar is a fictional character who resides in the "Dark Dimension" of the Marvel Comics multiverse. She is a Faltine, but is trapped in human form. Although she is a sorceress and has vast magical powers, she is still second to her brother Dormammu.