John O'Brien Marsham Cokayne (born 1920) (b. 1920) Parents Grace Margaret Marsham Brien Cokayne, 1st Baron Cullen of Ashbourne Children Michael Cokayne, 4th Baron Cullen of Ashbourne Siblings Ruth Margaret Cokayne Dorothy Grace Cokayne Edmund Willoughby Marsham Cokayne, 3rd Baron Cullen of Ashbourne Charles Cokayne, 2nd Baron Cullen of Ashbourne Barbara Mary Cokayne Partners Anne Frances Clayton