Calderwood was born at 57, Main Street, Egremont, Cumberland, on 22 January 1888, the son of Dr George Calderwood, a surgeon of Beech House, Egremont, by his marriage to Mary Eleanor Lindow.
The name Lindow came to him from his mother, one of the Lindow family of Bowness and Ingwell, Whitehaven, who had mining and other interests in Egremont [REF].