My g. grandmother was Ida May Kathrens, who was her mother?

Question

I have 2 last names that are shown for Ida May Kathrens Mother.  One is Eliza McNevins and the other Elizabeth McLean.  Which is it? The answer could change the whole tree of mine.  My grandfather was William Henry Hankin Junior and Ida May was his mother.  I need some help as there is conflicting information on the marriage certificate it says mother: McNevins  On her death certificate it says McLean.

Answer 1

Massachusetts Marriage Records 1841-1915

William H. Hankin married Ida M. Kathrens 29 Nov 1889 at Boston, MA. He was 51y and widowed, and his birthplace was Portsmouth, England. His est. birth year 1848. Parents were William Hankin and Maria Corwithen.

Ida M. Kathrens parents were shown as Williams Kathrens and Eliza McNevins.

Answer 2

I think you should go with the name on the marriage certificate.  Ida would have been the person to tell the name.  Some  one else reported it for the death certificate.