Percival Bowes Frederick1
Child of Percival Bowes Frederick
- Violet Christina Frederick+2 d. 1922
Violet Christina Frederick1 
Her married name became St. Clair.
Child of Violet Christina Frederick and Percival James St. Clair
- Rodney Samuel St. Clair+2 b. 1919, d. 1964
Rodney Samuel St. Clair1 
Children of Rodney Samuel St. Clair and Beatrice Wyatt Walker
- Malcolm Clive St. Clair+2 b. 1943
- Rosslyn Violet St. Clair+2 b. 1947
- Lynda Helen St. Clair+2 b. 1953
Beatrice Wyatt Walker1
From 1942, her married name became St. Clair. She lived in 2003 at Trefusis, Boomi, Moree, New South Wales, Australia.1
Children of Beatrice Wyatt Walker and Rodney Samuel St. Clair
- Malcolm Clive St. Clair+2 b. 1943
- Rosslyn Violet St. Clair+2 b. 1947
- Lynda Helen St. Clair+2 b. 1953
Malcolm Clive St. Clair1
Children of Malcolm Clive St. Clair and Julie Murphy
- Rodney James St. Clair2 b. 1973
- Timothy St. Clair2 b. 1975
Julie Murphy1
From 29 September 1971, her married name became St. Clair.
Children of Julie Murphy and Malcolm Clive St. Clair
- Rodney James St. Clair2 b. 1973
- Timothy St. Clair2 b. 1975
Rodney James St. Clair1
Iain Boyd Couper1
Children of Iain Boyd Couper and Rosslyn Violet St. Clair
- Samuel Boyd Couper2 b. 11 Nov 1971
- Rachel Kate Couper2 b. 1974
Rosslyn Violet St. Clair1
From April 1971, her married name became Couper.
Children of Rosslyn Violet St. Clair and Iain Boyd Couper
- Samuel Boyd Couper2 b. 11 Nov 1971
- Rachel Kate Couper2 b. 1974
