William Dowdall (b. Pilton 1803) and his wife Hannah (nee Rendell b.1806) had a daughter Lucy Ann Dowdall (b. Swansea 1844), who is a direct ancestor of mine. The family moved to Swansea in 1840/42. He was a painter in Swansea in 1851. William was buried on 9th February 1883 and Hannah died just weeks later on March 2 1883. Their address is given as Sketty, a relatively affluent area then and now. They are buried at St. Peter's Church, Cockett, Swansea.
See https://www.findagrave.com/memorial/201065669/william-dowdall for picture of headstone.