Name	Known for
Siân Phillips Nain Nain See fewer	Dune (1984)
Cal MacAninch Evan Llyr Evan Llyr See fewer	Downton Abbey (2010)
Osian Roberts Gwyn Griffiths Gwyn Griffiths See fewer	Emlyn's Moon (1990)
Lucy Donovan Nia Lloyd Nia Lloyd See fewer	The Chestnut Soldier (1991)
Stephanie Hull Catrin Lloyd Catrin Lloyd See fewer	Emlyn's Moon (1990)
Alun Horan Iolo Lloyd Iolo Lloyd See fewer	The Chestnut Soldier (1991)
Jill Richards Betty Lloyd Betty Lloyd See fewer	Very Annie Mary (2001)
Glan Davies Iestyn Lloyd Iestyn Lloyd See fewer	Coming Up Roses (1986)
Robert Blythe Ivor Griffiths Ivor Griffiths See fewer	High Hopes (2002)
Sharon Morgan Glenys Griffiths Glenys Griffiths See fewer	Apostle (2018)
Gareth Thomas Idris Llewelyn Idris Llewelyn See fewer	Blake's 7 (1978)
Steffan Morris Emlyn Llewelyn Emlyn Llewelyn See fewer	Torchwood (2006)
Manon Jones Nerys Lloyd Nerys Lloyd See fewer	Emlyn's Moon (1990)
James Lee Alun Lloyd Alun Lloyd See fewer	The Chestnut Soldier (1991)
Adam Orr Ewing Siôn Lloyd Siôn Lloyd See fewer	Wendy (2013)
Diggory Orr Ewing Gareth Lloyd Gareth Lloyd See fewer	The Chestnut Soldier (1991)