Arthur Trotter was an unseen character in Only Fools And Horses and the great, great grandfather of Derek "Del Boy" Trotter, and paternal grandfather of Edward Trotter, aka Grandad, Del's grandfather.
Arthur Trotter was born in about 1850 in London to parents who moved down to London (via horse and cart of course) from Yorkshire.
Born: About 1850, London
Spouse: Emilia Trotter (c1870-??)
Children: Jack Trotter Snr (c1875)
Grandchildren: George Trotter, Edward Trotter, Jack Trotter, Albert Trotter
Great Grandchildren: Reg Trotter
Great, Great Grandchildren: Derek "Del Boy" Trotter