The author of the famous commentary Fateh Al Bari on Al Bukhari is:

The author of the famous commentary Fateh Al Bari on Al Bukhari is:
Answer: Ibn Hajar

Ibn Hajar Al-Asqalani wrote Fateh Al Bari a detailed and authoritative explanation of Sahih Al-Bukhari. His work helps readers understand complex Hadith meanings and contexts. The phrase author of famous commentary highlights his scholarly contribution. No other scholar is linked to this exact work.