His descendant, Sir Philip Libourne, decided to live in a village in Kent called Lillieburn.
On 25 October 1286 King Edward I and Queen Eleanor of Castille visited William at Leybourne Castle.
They left two crowns as gifts, which hang above the wooden plaque about Sir William, which was unveiled in 1956 by Richard Talbot.
Then in Friday 10 June 1966 a bolt of lightning hit the tower and it caught fire, then they decided only to have one bell.
The tower was Norman, but in 1874, architect Sir Arthur Blomfeld encased it in an extra layer of wall.
Leybourne has a primary school, pre Norman-conquest church, 13th-century castle, hairdressers, shop, newsagent and general store, village hall, pub/restaurant (The Old Rectory) and Premier Inn Hotel.
Nearby Leybourne Lakes Country Park offer fishing, scenic walking and cycle paths plus water sports such as windsurfing and scuba diving.
[3] In mid-2005 work was started on the Leybourne bypass to handle the additional traffic from nearby Kings Hill.
The bypass was opened late in October 2006, with the aim of reducing traffic coming off the motorway and through Leybourne along Castle Way.