- Joan Barry's daughter, Henrietta Joan Tiarks, became a successful model who later married Henry Robin Ian Russell, then the Marquess of Tavistock or the 14th Duke of Bedford, where she became the Dowager Duchess of Bedford.
- Joan Barry's grandson, Andrew Ian Henry Russell, is presently the 15th Duke of Bedford, though he was born in Boston, Massachusetts.
- She had two children with her only husband, Henry Frederic Tiarks III, a wealthy merchant banker. A daughter, Henrietta Joan Tiarks and a son, Edward Henry Tiarks who died when he was only six months old in 1943.
- Father: Francis M. Bell.
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