I don't know middle names
I'm not sure about my great grandparents, they all passed before I was born. I know my Mom's grandma was named Thelma and her grandpa was called Nurses.
Maternal Great Grandparents:
Walter Reuben (I think Walter's parents were Agnes Rachael, went by Rachael, and Walter)
Paternal Grandparents (step father's parents):
Matthias (went by Mack)
I have no idea what my Great-grandparents were named :( I suppose I could research it, but have never gone beyond idle curiosity there.
Hugh James (Frosty)
Maternal: Loretta and James (Jim)
Paternal: Rolande and Maurice -- French Canadians