Thank you for your welcome and speedy answer.
I have Isabella's birth cert,[It does not mention Braithwaite] so I know she is his daughter. In 1851 I think it says MaryannPhilipson daugh & john Philipson son but then it says Braithwaite for Hannah, Margaret & Isabella {also interesting is that Philipsons are neighbours.} The 61 census reads the same as ditto marks under Braithwaite
I don' have a copy of 1871. [Apparently William was visiting the Peet family in Skelsmergh!] I think you are probably correct in the name being part of their family history. But it just seems odd to give the name in a census but not on a birth certificate. I thought it might help finding the next generation, but iv'e had no luck. Thanks again Just read you second message. I thought dittos referred to the line above them! Not the origional family name DUH! Sorry for wasting your time. Now I feel really old!Can you suggest anywhere online that I can find information about this area around Stavely/Hengill