William Tollemache, 9th Earl of Dysart

William John Manners Tollemache, 9th Earl of Dysart, DL (3 March 1859 – 22 November 1935) was an English peer and judicial officer.

Lady Dysart left him sometime early in the 20th century, probably due to William's eccentric and cantankerous nature, and she lived separately in London.

[3][9] He commissioned the composer Ferdinand Praeger to write a biography of Richard Wagner – however the controversy arising on its publication in 1892 eventually led to him to resign the presidency of the Association.

Following his wife's departure, he was joined at Ham by his niece Mrs Hack and her daughters who acted as hostesses to the continuing series of social events held there.

Instead of building though, much of the former lammas land was leased from 1904 to the Ham River Grit Company, and the area was exploited for gravel extraction to feed the demand from construction.

Towards the end of World War I, the Dysarts sold some land in Ham to the Government for the construction of a National Aircraft Factory leased first to Sopwith Aviation Company and then to Leyland Motors, adding to local demand for housing.

Upon his death, 22 November 1935, the Scottish peerage devolved upon his niece, Wenefryde Scott, while his British baronetcy was inherited by his second cousin Sir Lyonel Tollemache, 4th Baronet to whom Dysart bequeathed Ham House.