Name	Known for
Nerys Hughes Megan Roberts Megan Roberts See fewer	The Liver Birds (1969)
Freddie Jones Dr. Emlyn Isaacs Dr. Emlyn Isaacs See fewer	Dune (1984)
Nicholas Jones Dr. James Isaacs Dr. James Isaacs See fewer	In the Heart of the Sea (2015)
Janet Aethwy Ruth Jones Ruth Jones See fewer	Patagonia (2010)
Christine Pollon Dilys Humphries Dilys Humphries See fewer	The Avengers (1961)
Owen Garmon R.T. Williams R.T. Williams See fewer	The Proposition (1996)
Jack Walters 'Captain' Mansel 'Captain' Mansel See fewer	The Englishman Who Went Up a Hill But Came Down a Mountain (1995)
Nick Reding Adam Ebram Adam Ebram See fewer	It's Us (2013)
Sallie Anne Field Sophie Kent (as Sallie-Anne Field) Sophie Kent (as Sallie-Anne Field) See fewer	Sid and Nancy (1986)
Ioan Meredith John Jones John Jones See fewer	August (1996)
Valmai Jones Mary Jones Mary Jones See fewer	Pitching In (2019)
Rhoda Lewis Matron Matron See fewer	Florence Foster Jenkins (2016)
Robin Griffith Evan Reece Evan Reece See fewer	Torchwood (2006)
Bruce Montague Mr. Ebram Mr. Ebram See fewer	Dimensions of Fear (1963)
Aviva Goldkorn Mrs. Ebram Mrs. Ebram See fewer	In the Forest (1978)
Peter Halliday Hotel Manager Hotel Manager See fewer	The Remains of the Day (1993)