"Vicarage, united with Whaddon since 1840. Civil parish united with Whaddon, 1935; renamed Brookthorpe-with-Whaddon, 1956." (Ref: Guide to the Parish Records of the City of Bristol and the County of Gloucester; I. Gray & E. Ralph, 1963)
You can see the administrative areas in which Brookthorpe has been placed at times in the past.
Select one to see a link to a map of that particular area.