>>>"..., I mentioned Harry was married to Ruth, and in his obituary (which I forgot to mention), Ruth is mentioned as his wife, with no mention of Stella."<<<
When were Richard Earl Byrne, Jr and your uncle Michael born? That 28 Nov,1947 "Application for Marriage License" for Harold L. Byrne and Stella B. Gray shows that Harold's first wife had died earlier in 1947.
It wouldn't be unheard of for surviving children to ignore the existence of a 2nd marriage of a parent, especially if there was not regular contact among the family members &/or no additional children. But maybe the rest of the info in the obituary disproves that?