Dilys Elwyn-Edwards was born in Dolgellau and attended DWS in the 1930s. In an interview with her recorded in 1984 she talked about the school's influence on her musical career.
Marion Eames was a pupil at DWS from 1932 to 1937. She is considered to be one of the foremost Welsh historical novelists. Her first novels, Y Stafell Ddirgel (1969) and Y Rhandir Mwyn (1972), are historical novels based on the Quakers of Dolgellau and their emigration to Pennsylvania.
Bronwen Astor, Viscountess Astor (Died 28 December 2017) attended Dr Williams' School during World War II and wrote a graphic account of her experiences at that time.
Eluned Morgan was born in 1870 on board the Myfanwy en route to the Welsh settlement in Patagonia. She is regarded as one of Patagonia's leading Welsh-language writers. She was the daughter of Lewis Jones, one of the founders of the Welsh Settlement.