Mirza Fazal Ahmad was the son of Mirza Ghulam Ahmad He and his elder brother Mirza Sultan Ahmad were disinherited by Mirza Ghulam Ahmad and their mother was divorced by him – as part of the Muhammadi Begum saga. These were the two sons from the first wife of Mirza Ghulam.
Mirza Fazal Ahmad had no issue from his first wife. He married again and had a child by his second wife who died in mysterious circumstances in his young age.
He died in 1904 and his funeral was not attended by his father.