Thomas Peers Williams (27 March 1795 – 8 September 1875) was a British politician, military officer and landowner who was a member of Parliament for Great Marlow from 1820 to 1868.

His great-grandfather was Owen Williams of Cefn Coch, Llansadwrn, who owned also Tregarnedd and Treffos.

Williams' grandfather was retained by the Hughes and Lewis families to act for their in very acrimonious litigation with Sir Nicholas Bayly (father of the Earl of Uxbridge) in relation to the Parys Mountain copper mine.

[4] He was commissioned as a Captain in the Royal Anglesey Light Infantry Militia on 10 April 1835,[5] and was promoted to Lieutenant-Colonel Commandant on 10 March 1853.

[6] Williams' family gradually released their hold on the copper industry and, today, are chiefly remembered as owners of the Craig-y-don estate, Members of Parliament, and the founders of banks.

[18][19] They had two children: Jan Korybut-Woroniecki, a London restaurateur, and Marysia Korybut-Woroniecka, a fashion business executive based in New York.