Sir Lyonel Felix Carteret Eugene Tollemache, 4th Baronet (15 January 1854 – 4 March 1952) was an English landowner.

[1] He married Hersilia Henrietta Diana Oliphant (or Collingwood) in 1881 and they had three daughters and three sons, all born in Eastbourne: On the death of his second cousin, William Tollemache, 9th Earl of Dysart, 3rd Baronet, he succeeded to the baronetage in 1935 at the age of 81.

[6] The father and son duo increasingly struggled to maintain Ham House, especially as the outbreak of war reduced the availability of labour.

[8] After the war, in 1948, Tollemache and his son donated Ham House and its gardens to the National Trust, a plan that had been under consideration since James Lees-Milne's visit in March 1943.

[6] In 1949, Buckminster Estates Ltd, the Tollemache's company established in 1936, sold the remaining Tollemache interests in the area by auction in 124 lots comprising 350 acres (140 ha) land, 41 residences, 99 cottages, a farm, 4 shops, 2 licensed premises, freehold ground rents and building plots and the sand and gravel works.