From the Brooklyn Eagle, via Fulton History:
John J. Dowd was the husband of Anne Murphy Dowd, and thus the son-in-law of Mary Ann Toner Murphy. His brothers-in-law, John and Thomas Murphy, had lived for a time with their aunt and my great-great-grandmother, Julia Mulvaney. He died on Friday 26 July 1946 - either "at his residence" or at "Madison Park Hospital"; the two news items, from the same page of the same day's paper, disagree on that point.
He was survived by his widow, Anne Murphy Dowd, and I have yet to discover evidence of her death.