Mary E. Woodall (Powell) and Mary E. Moon (Powell) disambiguation

There are similar birth dates for these 2 profiles, however, they may not be the same (similar parent names, but not same husbands).
My grandmother, Mary E. Woodall was known to have married, sucessively, 2 brothers, Herbert Woodall, and then William Woodall, both living on the family farm in Sutherland, Iowa. Mary also had a previous daughter, Ella (father unknown). I have no knowledge of Mary having married a William H. Moon, and having had children with him.

from Myheritage:
"Mary E. Moon (born Powell)
FamilySearch Family Tree

Birth:
Nov 1881 - Wisconsin, United States
Parents:
William E. Powell, Salina S. Powell (born Woodall)
Husband:
William H. Moon
Children:
Lulah Leon Moon, Curtiss Moon, Ealla Moon
Siblings:
Ira John Powell, William Powell, Thomas Powell, Fanny Paull (born Powell), Mamie E Moon"

I therefore believe they may have simply been homonyms (i.e. different people).

Anyone with further info? (Errors may be due to several "Salina Powell" born in different years...)