A Nathan Calverley(1780-1848) in my wife's tree was married to Sophia Altham(1780-1874). They had a son William(1828-?) who married Hannah Walker in 1856. William and Hannah had 4 other children Emma, Agnes, Isabella and M.
Nathan's parents are Nathan(senior) and Susanna Pilling. It appears Nathan and Susanna are your ancestors as well.
Nathan Senior's parents are James Calverley and Alice Ellis. James parents are Robert and Averil Ibbotson. Roberts parents are Richard and Margaret Hartley.
I can provide you with some additional information about these people and would be most interested in your documentation regarding Nathan witnessing William's marriage certificate. Nathan(1780-1848) had a sister Ann who is my wife's ancestor. Our family tree-private-is Calverley Jansen Ruff Zahl. Please log on to the tree and send me a message.