According to the tree, Dominic’s wife was Catherine and her parents are unknown.
Dominic’s children:
Thomas Higgins - 1st son (should be named after the father’s father, but isn’t)
Bridget Higgins - 1st daughter (should be named after the mother’s mother, but name unknown)
James Higgins - 2nd son (should be named after the mother’s father - Dominic’s father was named James)
Winifred Higgins - 2nd daughter (should be named after the father’s mother, possibly was?)
Dominic Higgins - 3rd son (should be named after the father, which he was)
Patrick Higgins - 4th son (should be named after the father’s eldest brother, but it looks like Dominic was the oldest child)
John Higgins - 5th son
Dominic and Catherine kind of followed the naming pattern, I guess? [Naming pattern according to one website]
Note: most of my Irish ancestors did not follow the pattern so I’m not surprised to see that Dominic may not have done so as well.