Omar vel Homar[1] vel Umarus[2] vel Omarus[2] (Arabice: عمر بن الخطاب ʿUmar ibn al-Ḫaṭṭāb, natus Meccae anno circiter 586–589; mortuus Medinae die 7 Novembri 644), appellatus etiam Omar I et Omar Magnus, fuit socius Mahometi, et, Abubeceremortuo, alter calipha, annis 634–644 regnans.
OmarGladius Caliphae Umar, cum capulo aetatis posterioris.
Genitores: Al-Khattab bin Nufayl; Ḥantamah bint Hishām Coniunx: Umm Kulthum bint Ali ibn Abi Talib, Atika bint Zayd, Umm Kulthum bint Asim, Umm Kulthum bint Jarwal, Qurayba bint Abi Umayya, Zaynab bint Madhun Proles: Abd Allah ibn Umar ibn al-Khattab, Asim ibn Umar, Hafsa bint Umar ibn Al-Khattab, Obaidullah bin Omar bin al-Khattab