I have Billingtons from Philadelphia on my tree, who married into the Tatham family. I have Mary b c 1780 who married James Tatham in Germantown 31 oct 1805. Mary Billington had brothers: Thomas, George, Charles, William, John, Henry, and five sisters. I think they were Quakers. Is this the same family and does it stem from the Mayflower Billingtons?