Is Doyle not Rachel's husband?
Rachel's father may or may not have been someone called Patrick and may or may not have been an ex-soldier/soldier.
Here's Rachel Doyle in 1911- ages consistant with 1901 so perhaps Rachel reduced her age a few years so as not to be older than her husband- think the 'son' John Doyle could be the adopted orphan John Boyd with them in 1901:
www.census.nationalarchives.ie/pages/1911/Antrim/Falls/Waterford_Street/175074Another interesting bit from 1911 is that Rachel had 8 children but only 2 living.