- Alice Matilda Langland (Alis Mallt Williams)
- Place of Birth: Oystermouth, Glamorganshire
- Dates: 1867-1950
- One of the Royal Celts (1889)
- A Maid of Cymru (1901)
- Alun Lewis
- Place of Birth: Cwmaman, Glamorganshire
- Dates: 1915-1944
- Raider’s Dawn (1942)
- The Last Inspection (1942)
- Ha! Ha! Among the Trumpets (1944)
- In the Green Tree (1948)
- Letters from India (1946 ph.)
- Alun Thomas Lewis
- Place of Birth: Llandudno, Caernarfonshire
- Dates: 1905-
- Corlan Twsog (1948)
- Y Piser Trwm (1957)
- Blwyddyn o Garchar (1962)
- Y Dull Deg (1973)
- Cesig Eira (1979)
- Eiluned Lewis
- Place of Birth: Newton, Montgomeryshire
- Dates: 1900-1977
- Dew on the Grass (1934)
- December Apples (1935)
- The Land of Wales (1937)
- The Captain’s Wife (1943)
- Morning Songs (1944)
- In Country Places (1951)
- The Leaves of the Trees (1953)
- Honey Potts and Brandy Battles (1954)
- Saunders Lewis
- Place of Birth: Wallasey, Cheshire
- Dates: 1893-1985
- The Eve of St. John (1921)
- Gwaed yr Uchelwyr (1922)
- A School of Welsh Augustans (1924)
- An Introduction to Contemporary Welsh Literature (1926)
- Williams Pantycelyn (1927)
- Ceiriog (1929)
- Monica (1930)
- Ieuan Glan Geirionydd (1931)
- Braslun o Hanes Llenyddiaeth Gymraeg (1932)
- Buchedd Garmon (1937)
- Canlyn Arthur (1938)
- Amlyn ac Amig (1940)
- Byd a Betws (1941)
- Straeon Glasynys (1943)
- Ysgrifau Dydd Mercher (1945)
- Blodeuwedd (1948)
- Crefft y Stori Fer (1949)
- Eisteddfod Bodran (1952)
- Gan Bwyll (1952)
- Gymerwch Chi Sigaret (1956)
- Siwan (1956)
- Siwan a Cherddi Eraill (1956)
- Brad (1958)
- Esther (1960)
- Serch yw’r Doctor (1960)
- Merch Gwern Hywel (1964)
- Yn y Trên (1965)
- Cymru Fydd (1967)
- Gramadegau’r Penceirddiaid (1967)
- Problemau Prifysgol (1968)
- Y Cyrnol Chabert (1968)
- Meistri’r Canrifoedd (1973)
- Branwen (1975)
- Dwy Briodas Ann (1975)
- Cell y Grog (1975)
- Excelsior (1980)
- Meistri a’u Grefft (1981)
- William Robert Lewis
- Place of Birth: Llangristiolus, Anglesey
- Dates: 1948-
- Dan Flodau’r Gustanwydden (1974)
- Geraint Llywelyn (1976)
- Yn ôli’r Wlad (1976)
- Kate (1977)
- Y Gwahoddiad (1978)
- Y Fuddugoliaeth (1980)
- Ymylau Byd (1980)
- Ty Mawr (1983)
- Gweneth Lilly
- Place of Birth: Liverpool
- Dates: 1920-
- Y Drudwy Dewr (1980)
- Gêw o Guddio (1980)
- Gaeaf y Cerrig (1981)
- Hwyl a Helynt Calan Gaeaf (1981)
- Y Gragen a’r Drych (1982)
- Rwyn Cofio dy Dod (1982)
- Hogan y Plas (1983)
- Orpheus (1984)
- Alun Llewellyn
- Place of Birth: London
- Dates: 1903-
- The Deacon (1934)
- The Soul of Cezar Azan (1938)
- Jubilee John (1939)
- The Strange Invaders (1934)
- Confound Their Politics (1934)
- The Tyrant from Below (1957)
- Ways to Love (1958)
- Shelley Plain (1960)
- The Shell Guide to Wales (1969)
- Michael Gareth Llewelyn: See Frederic Evans.
- Richard Llewellyn: See Richard Llewellyn Lloyd.
- Ellis Lloyd
- Place of Birth: Newport, Monmouthshire
- Dates: 1879-1939
- Love and the Agitator (1911)
- Scarlet Nest (1919)
- A Master of Dreams (1921)
- John Selyn Lloyd
- Place of Birth: Tal-y-sarn, Caernarfonshire
- Dates: 1931-
- Llygad y Daran (1974)
- Esgyrn Sychion (1977)
- Trysor Bryniau Caspar ()
- Richard Llewellyn Lloyd (Richard Llewellyn)
- Place of Birth: St. David’s, Pembrokeshire
- Dates: 1906-1983
- Poison Pen (1937)
- How Green Was My Valley (1939)
- None but the Lonely Heart (1943)
- Norse (1947)
- A Few Flowers for Shiner (1950)
- A Man in a Mirror (1961)
- The Scarlet Suit (1962)
- Up, into the Singing Mountain (1964)
- Sweet Morn of Judas’ Day (1964)
- Down Where the Moon Is Small (1966)
- Ecce! (1974)
- Hat! (1974)
- At Sunrise, the Rough Music (1976)
- A Night of Bright Stars (1979)
- Place of Birth: Oystermouth, Glamorganshire