 Proby's first cousin William Proby was the ancestor of the Earls of Carysfort.The Proby Baronetcy, of Elton Hall in the County of Huntingdon, was created in the Baronetage of the United Kingdom on 30 January 1952 for Major Richard Proby, President of the Country Landowners' Association.He was the son of Colonel Douglas Hamilton, who assumed by Royal licence the surname of Proby in 1904, son of Lord Claud Hamilton and his wife Lady Elizabeth Emma Proby, daughter of Granville Leveson Proby, 3rd Earl of Carysfort, and sister of William Proby, 5th Earl of Carysfort (on whose death in 1909 the earldom became extinct).