Marjorie Sowden1
From 1945, her married name became Mason. After her marriage, Marjorie Sowden was styled as Baroness Mason of Barnsley on 20 October 1987.
Children of Marjorie Sowden and Roy Mason, Baron Mason of Barnsley
- Hon. Susan Ann Mason+2 b. 1947
- Hon. Jill Diane Mason+2 b. 1955
Hon. Susan Ann Mason1
From 1969, her married name became Duke.
Children of Hon. Susan Ann Mason and Allen Duke
- Steven Allen Duke2 b. 1975
- Caroline Ann Duke2 b. 1978
Allen Duke1
Children of Allen Duke and Hon. Susan Ann Mason
- Steven Allen Duke2 b. 1975
- Caroline Ann Duke2 b. 1978
Hon. Jill Diane Mason1
From 1979, her married name became Martin.
Child of Hon. Jill Diane Mason and Kevin Charles Edward Martin
- Andrew Ian Martin2 b. 1986
Kevin Charles Edward Martin1
Child of Kevin Charles Edward Martin and Hon. Jill Diane Mason
- Andrew Ian Martin2 b. 1986
Andrew Ian Martin1
Joseph Mason1
Child of Joseph Mason and Mary (?)
- Roy Mason, Baron Mason of Barnsley+2 b. 18 Apr 1924, d. 19 Apr 2015
