Pretty sure Gary Gygax was married when he literally invented D&D.
With 5 or 6 children at the time, I believe. Although, according to some sources, the basic idea behind DnD was Dave Arneson's, and the first DnD game was his Blackmoor campaign group.
Certainly the original DnD rules set were published by Gygax, since he was older and had the resources and connections to make it happen ( just about ), so where his ideas and Arneson's diverged, the Gygax ideas appeared in print.
Personally I liked the ADnD ruleset best, although 2e contained a lot that had merit. 3e's best feature was feats, 4e's best feature was rethinking how resources are used and regained, and 5e's best feature is rethinking the magic system.
Between them, they might make the basis of a good game