Just turned a page on my Groger/Brand and lo and behold, I have your Stephen. He's the brother of my ggg grandmother Freelove Groger.
Stonington is in Connecticut, not RI but they are so close and Stonington and Westerly both have Thomas Brand, Jr. as a freeman in 1704.I have written each of their libraries asking what the connection is between the 2 towns.
I don't know if you have your Stephen's siblings.I have: Richard Jr, William, my Freelove, John,David Leavitt (the Leavitt is for his grandmother Isabelle Leavitt), Hannah (for her mother) Isabella (again grandma), Mary and Ann.
If you don't have the information, I also have the spouses of these kids.