Yes, it comes as no surprise to learn that Grandpa Calkins was descended from a long line of Calkins ancestors.
Comparing our lineage to that of Harvey Reeves Calkins, it becomes apparent that we are descended from Stephen Calkins (1706-1761), a great-grandson of Hugh Calkins, who came to America in about 1640, and the son of Samuel Hugh Calkins (1663-1755). This Stephen was a father of 10 children.
In contrast, Willard Peck Calkins was descended from John Calkins (1693-1776), also a great-grandson of Hugh Calkins, who came to America in about 1640, and a son of Samuel Hugh Calkins (1663-1755). This John was a father of 8 children from his first wife and 11 from his second wife.
So all of these roads diverged in various directions and that makes a difference.
To further diverge, we are descended from Joseph Calkins, a son of Stephen Calkins, whereas Harvey was descended from Justus, another son of Stephen Calkins. Until this time all of these Calkins lived in Connecticut, but somehow Joseph ends up in Rutland, Vermont, whereas Justus goes to New York.