My Father, Edward J. Lyons was Eugene's half brother. I have the obituary listing from James J. Lyons, Eugene's Father? Step Father? He passed away on March 16, 1968. I believe Mildred has also passed away. I don't know a lot about my Dad's side of the family, but I do have an Uncle, my Mom's brother who does. I found the obituary in his files and since I did not know a lot about Eugene I did a search and came up with you post.
Feel free to email me at email@example.com and I will see about getting you in touch with my Uncle. Also, the obituary has family names listed. I can email this to you if like.