In 1901 there is another son Thomas Wilfred born c1891 West Leeds with George and Elizabeth, I have not found a corresponding birth reference.
You may already have your grandfather's marriage
Wrangthorn, St Augustine, Yorkshire, 11 Nov 1896
William Edward STEPHENSON age 27 bachelor Florist
and Sarah Eleanor NICHOLSON age 26 spinster father William NICHOLSON deceased Clerk.
Witnesses Mary Jane STEPHENSON & John Edward MIDDLETON