Agreed. For the original posting (but note that he has not made any further posts since 1999!)
28 Aug 1910, St. Matthew's Church, Fulham, London, England
William Edwards Castleton, 23, of Wandsworth Bridge Road, s/o George Alexander Castleton
Rose Emma Jane Gower, 25, of Wandsworth Bridge Road, d/o William James Gower (dec'd)
William Edward Castleton, 20 Oct 1886, Lambeth, London, England
Baptised 31 Aug 1890 at St. Mary's Church, Lambeth, London, England
William Edwards Castleton, s/o George Alexander & Mary Ann (Wools), of Jonathan Street, Lambeth.
(siblings Edith Margaret, George Thomas, Louisa also baptised)
Later of Barton Street, East Hamilton, Ontario, Canada. Married Alice Bumby in 1925.
So he was definitely English, not Welsh!
But ... is this the same person as the one in your tree????