
Rev Dr Gwilym Arthur Edwards MA, DD was a Welsh Presbyterian minister and writer on theological topics. He was Principal of the United Theological College Aberystwyth from 1939 to 1949.

Bethan Gwanas is a popular contemporary Welsh author, who publishes almost exclusively in the Welsh language. A prolific writer, she has had 17 titles published in the last decade. Whilst not just a fiction writer, she has written novels for teenagers and Welsh learners, though most of her recent work has been for adults.

Professor Thomas Gwynn Jones C.B.E., more widely known as T. Gwynn Jones, was a leading Welsh poet, scholar, literary critic, novelist, translator, and journalist who did important work in Welsh literature, Welsh education, and the study of Welsh folk tales in the first half of the twentieth century. He was also an accomplished translator into Welsh of works from English, German, Greek, and Irish.

Thomas Llewelyn Jones was a Welsh language author. Over a writing career of more than 50 years, he became one of the most prolific and popular authors of children's books in Welsh. He wrote, and was generally known, as T. Llew Jones.

Moelona was the pen-name of Elizabeth (Lizzie) Mary Jones, a Welsh novelist and translator who wrote novels for children and other works in Welsh.

Eluned Morgan, was a Welsh-language author from Patagonia.

Kate Roberts was one of the foremost Welsh-language authors of the 20th century. Styled Brenhines ein llên, she is known mainly for her short stories, but also wrote novels. Roberts was a prominent Welsh nationalist.

Manon Steffan Ros is a Welsh novelist, playwright, games author, and scriptwriter. She is the author of over twenty children's books and three novels for adults, all in Welsh. Her award-winning novel Blasu has been translated into English, under the title of The Seasoning.

Jason Shepherd is a Welsh podcast host, author, artist and audiobook narrator. Since 2008 he has produced and hosted the internationally recognized Learn Welsh Podcast, about Welsh language and culture, and has been involved in several book projects. Shepherd was an honorary guest of the Los Angeles St. David's Day Festival between 2011 and 2013, where he taught the Welsh language, and worked as Cultural Editor of Celtic Family Magazine from 2013 to 2015.

Howard Spring was a Welsh author and journalist who wrote in English. He began his writing career as a journalist but from 1934 produced a series of best-selling novels for adults and children. The most successful was Fame Is the Spur (1940), which was later adapted into a film starring Michael Redgrave and, later still a BBC TV series (1982) starring Tim Pigott-Smith and David Hayman.
Angharad Tomos is a Welsh author and prominent language activist. She is a recipient of the Tir na n-Og Award.

Elizabeth Watkin-Jones was a Welsh children's book author, who wrote in the Welsh language.