فارق = fariq = اختلاف = difference
فارق = fariq = مميز = distinctive
فاروق = farooq = شديد الخوف = One who is more afraid.
فاروق = farooq = من يفرق بين الحق والباطل = One who distinguishes truth from falsehood.
Omar Bin ul Khatab, second Caliphah after the Prophet ( Peace be upon Him ) is known as
Omarul Farooq because of his deep faith in truth.