Name	Known for
Rhys ap William Cai Cai See fewer	The Indian Doctor (2010)
Sera Cracroft Eileen Eileen See fewer	Pobol y Cwm (1974)
Arwyn Davies Mark Mark See fewer	Byw Celwydd (2016)
Donna Edwards Britt Britt See fewer	Belonging (2000)
Carys Eleri DI Fielding DI Fielding See fewer	Under Milk Wood (2015)
Mark Flanagan Jinx Jinx See fewer	Hidden (2018)
Llinor ap Gwynedd Gwyneth Gwyneth See fewer	Y Palmant Aur (1996)
Nel Hannah Arwen Arwen See fewer	Pobol y Cwm (1974)
Elin Harries Dani Dani See fewer	Casualty (1986)
Ellis Lloyd Hughes Gwern Gwern See fewer	Pobol y Cwm (1974)
Siw Hughes Kath Kath See fewer	Pobol y Cwm (1974)
Lois Meleri Jones Tesni (as Lois Meleri-Jones) Tesni (as Lois Meleri-Jones) See fewer	Dal Y Mellt (2022)
Siwan Morris Andrea Andrea See fewer	The Machine (I) (2013)
Jonathan Nefydd Colin Colin See fewer	The Way (II) (2024)
Bethan Ellis Owen Ffion (as Bethan Elis Owen) Ffion (as Bethan Elis Owen) See fewer	Solomon & Gaenor (1999)
Sharon Roberts Gaynor Gaynor See fewer	Cowbois Ac Injans (2006)
Sue Roderick Cassie Cassie See fewer	Under Milk Wood (2015)
Andrew Teilo Hywel Hywel See fewer	Baker Boys (2011)