Seeking any relatives, descendants of John (Jack) Calderwood,born 11.11.1883, of David Dykes and Martha Calderwood, originally from the Glasgow area, but from around 1875/1877 in the London area. When John married Amy B. Nunn 18.11.1926 he was then a widower,tracing details of his first marriage. This marriage was witnerssed by a Flora Calderwood. Amy Calderwood died, date of death unknown. John Calderwood married Marguerite Rose Forman at St. Pancras London 14.9.1940. Witness to this marriage was a F. Calderwood, could be the same person. John died 15.2.1960. John had at least 3 Brothers, David, William, Alexander, and one sister Mary. Any info would be appreciated.