About Umar ibn Al-Khattab
[Wikidata] 2nd Rashidun Caliph from 634 to 644... | [Wikipedia] Umar ibn al-Khattab was the second Rashidun caliph, ruling from August 634 until his assassination in 644. He succeeded Abu Bakr and is regarded as a senior companion and father-in-law of the Islamic prophet Muhammad.
