He married Eugénie Esther Cordeiro in 1911 and had five children: Albert Anthony Gabriel, Barbara Angela, Charlotte Mary Sophie, Domnic Claudius, and Ernest Braz.

His grandfather was Braz Fernandes from Chorão Island, and his granddaughter (from Charlotte) is Bernadette Simmons, who married Ivan Trayling.

[citation needed] Fernandes, though a mechanical engineer by training, had various interests and studied botany, zoology, ornithology and knew painting and music.

Fernandes died in June 1951, whereupon a condolence meeting of the Bombay Historical Society was held at the Prince of Wales Museum in the Library Room.

His Excellency Mangal Das Pakvasa, Governor of Madhya Pradesh and President of the Bombay Historical Society, sent a condolence message on the occasion.