Here's a link to the Times of London obituary:-
http://www.timesonline.co.uk/article/0,,60-557318,00.html
She was Diana Rosamond, daughter of Gerald L.E. Gould, of Paris and
London, by his wife, Lady Harcourt [Evelyn Stuart, the concert
pianist]; and married Menuhin as his secnd wife in 1947.
Lady Menuhin had two sons from her marriage - Gerald, and Jeremy. The
younger son married the Hon Brigid Forbes-Sempill, daughter of the
19th Lord Sempill.
--
Michael Rhodes.