So sorry to confuse everyone but I have now discovered that my Great Grandmother Isabella Keay was married twice. She was born Isabella Lindsay and married David Keay in 1869. They had a son, also born in 1869, called David, christened at Edinburgh Parish. Isabella remarried in 1873 to George March in Newcastle upon Tyne and on the 1881 and the 1891 census her son David has taken the name of March. I can not locate him on the 1901 census. Does anyone have info on David Keay/Isabella Lindsay?