Cavendish Family History and Genealogy or The Cavendish Family. PDF eBook English 18.3 MB. 1911. The book not only includes genealogy for American descendants, but also enchanting family legends over 600 years old! Including how Judge Cavendish bought the manor of Cavendish held by the family of Odyngseles in 1359. According to another legend, Roger Gernon, who died about 1323, married the heiress of John Potton, Lord of Cavendish in Suffolk; the eldest of his four sons, who all took the name of Cavendish, being Sir John the Judge. Fascinating!