Omar bin al-Khattab, second Islamic Rashidun (a term meaning "rightly guided") caliph. Father-in-law and companion of Muhammad. Father of Hafsa. One of the ashara mubashara, ten companions or sahaba promised paradise. He was given the title farooq, meaning the one who distinguishes between right and wrong, by the prophet Muhammad. Commonly referred to as amir al-mumineen meaning commander of the faithful.
"Omar bin al-Khattab, revered as the Farooq and Amir al-Mumineen, served as the second Rashidun caliph after being a close companion of Prophet Muhammad."
The name Omar comes from the Arabic word ʕumar and is a doublet of the more common English spelling, Umar. Both forms refer to the same historical figure and share an identical meaning in their respective languages.