AND THE ANSWER IS. . . . . .

I guess it's not as obvious to everyone else.......

The correct answer is #5 Jenness Mary Heywood

Names of everyone in the picture are as follows:
1) Evelyn Afton Heywood (AKA Grandma Bean)
2) Donna Heywood (AKA Aunt Donna)
3) Marion Heywood (AKA Aunt Marion)
4) Your guess is as good as mine (I think she is a cousin.)
5) Jenness Mary Heywood (AKA my grand children's Great Grandma)