Catherine Snowden, daughter of Isaac, does not exist. The names of Isaac's children are well documented and there isn't a Catherine among them. This link came from "name grabbing" around the turn of the century. It's not based on evidence. Most contemporary sources list only his sons who made it to adulthood.
Isaac Snowden's children from his first marriage were Benjamin and Mary. From his second marriage they were Isaac, Gilbert Tennent, Samuel Finley, Nathaniel Randolph, Charles Jeffry, Mary and William. Both Marys and William died in infancy.
Source:
The North American, Philadelphia, Sunday, July 14, 1912
Old Philadelphia Families
by Frank Willing Leach
It is my belief that John Hamilton married Catherine "Kitty" Robeson/Robinson/Roberson (not sure from the various spellings in the marriage consent documents). After John died (seems the only had one child named Sarah Hamilton), Kitty married Elijah Graves and had issue: Henry, Samuel, Armilda, Emily, Susan, and Eliza Ann Graves. Elijah Graves signed off on his "step-daughter" Sarah's marriage to Edwin Wright.
