Yes, I am related - descended from Richard's brother Thomas.
I see you have Eric Page's information on the Galtress Family. It's so comprehensive there's not a lot I can add (other than in recent years). My line is sheet 1AA through Thomas's son George (born 1863).
The only extra information I have is that the Mary that John Galtress (born 1701) married was I believe Mary Robinson. They were married in Strensall on 24 November 1734.