Their eldest son Sir Thomas Francis Fremantle (1798–1890) became a prominent Tory politician.

Their second son Charles (1800–1869) followed his father into the British Royal Navy and was instrumental in founding the Swan River Colony in Western Australia, which accounts for the place names Fremantle, Swanbourne and Cottesloe in the Perth area.

The present head of the family is Commander John Tapling Fremantle, 5th Baron Cottesloe, a former Lord Lieutenant of Buckinghamshire.

[11] St Swithun's Anglican Church, a Grade II* historic listed building, stands at the east end of the village, opposite Swanbourne House.

The latter, showing Thomas Adams (died 1626) and his family, bears the baneful inscription, "Who in prime of youth by bloudy theves was slain, / In Liscombe ground his bloud ye grass did staine".

[2] Swanbourne Baptist Church in Mursley Road, was built in 1809, rebuilt in 1863 and closed in 1972, when it was converted into a dwelling.

[13][14] There are limited weekday bus services between Swanbourne and Winslow, Bletchley or Central Milton Keynes.

Under the 1955 "Modernisation of British Railways" plan, a scheme was developed to build a large automated marshalling yard; this was cancelled in 1960 before construction started, though a new flyover to carry the route over the main line at Bletchley was completed.

[16] The station site is about 1.5 miles (2.4 km) from the village, halfway to Little Horwood and about the same distance from Mursley.

In summer 2020, the old station and platforms were demolished to clear the route for the new East West Rail.