Omar Ibn Al-Khattab - may God be pleased with him - was nicknamed:
The answer is: Farooq.
Omar ibn al-Khattab was a respected leader in the Islamic community and widely known as one of the most influential companions of the Prophet Muhammad (may God bless him and grant him peace). He was famous for his courage and wisdom, and was nicknamed “Al-Farouq,” which translates to “he who distinguishes truth from falsehood.” He was also known for his justice and fairness, which earned him great respect from his community. Omar's reign as the second Caliph of Islam was marked by many achievements and continues to be an inspiration to Muslims today. His legacy lives on in the many stories and anecdotes that are still shared about him to this day.