Sir Thomas Fairfax (1612-1671) 

Supporter of Oliver Cromwell. He forced the surrender of Thomas Blagge in 1646 at Wallingford Castle through a siege during the Civil War.

http://www.british-civil-wars.co.uk/biog/fairfax.htm
http://www.fairfax.org.uk/MAIN/ARTICLES/RESEARCH/Fairfax/ffxregiment.HTM
http://www.bbc.co.uk/history/historic_figures/fairfax_thomas.shtml

Sir Thomas Fairfax

Robert de Ferrers (1239-1279)

De Ferrers was the 6th earl of Derby – imprisoned at Wallingford in 1269 by Henry de Alemain until released by Lord Edward. He rebelled against King Henry III and was arrested and imprisoned first in the Tower of London, then in Windsor Castle and Wallingford Castle, and his lands and earldom were forfeited, including Tutbury Castle, which still belongs to the Duchy of Lancaster.

Robert de Ferrers

Edgar Field (1854-1934)

Born in Wallingford, Field played football while at school at Lancing College. He then played in defence for Clapham Rovers, including in two FA Cup Finals – a 1-0 defeat to Old Etonians (1879) and a 1-0 victory against Oxford University (1880). He played twice for England – in 1876 and 1881 – both against Scotland, and in the latter game, he scored the first own goal ever scored by an England player in their 6-1 defeat. He later played for Reading. An amateur footballer, as professionalism had not been introduced, he was an accountant and later settled in Derby.
http://www.englandfootballonline.com/TeamPlyrsBios/PlayersF/BioFieldE.html

Sir Hugh Fish (1923-1999)

Hugh Fish was a pioneer of water and environmental management who helped clean up the River Thames. Born in Yorkshire, he initially worked monitoring rivers in Essex, before becoming Chief Purification Officer for the Thames Conservancy in 1969. He then joined Thames Water Authority as its Director of Scientific Services in 1974 before becoming its Chief Executive 1978. In 1984 he left to become Chairman of the Natural Environment Research Council, where he worked until 1988. Knighted in 1987, he was made President, Institute of Fisheries Management 1987-99, while also Chairman of Water Engineering Ltd 1988-91. He lived in Wallingford and died there 27 May 1999.
http://www.findarticles.com/p/articles/mi_qn4158/is_19990612/ai_n14228482

Brien FitzCount (c1090-1149)

Lord Of Abergavenny, and supporter of Empress Matilda, daughter of Henry I. He married another Matilda, generally thought to be the daughter of Robert D'Oilly. In 1127, Henry I had instructed FitzCount to go with his daughter Matilda when she married Geoffrey D'Anjou in France. He fortified Wallingford Castle in 1139, and opposed King Stephen's forces here. He also built a prison, known as Cloere Brien, to imprison William Martel, one of Stephen's supporters.
http://www.berkshirehistory.com/bios/bfitzcount.html

Henry FitzGerald (-c1170)

An administrator for King Stephen, believed to have been given the title of Constable of Wallingford Castle sometime after 1154.
http://www.berkshirehistory.com/bios/bfitzcount.html

Sir John Fortescue of Salden (c. 1531 –1607)

John Fortescue was the third Chancellor of the Exchequer of England, serving from 1589 until 1603. He was returned as MP for Wallingford in 1558 and 1572. Fortescue also held the position of Chancellor of the Duchy of Lancaster from 1601 to his death.

Sir John Fortescue