Llywelyn is a name of Welsh origin, with many spelling variations (see Llywelyn (name)).
Historically the name may refer to any of several Welshmen:
Llywelyn ap Merfyn (died 942) early 10th century King of PowysLlywelyn ap Seisyll (died 1023), king of Gwynedd and DeheubarthLlywelyn the Great (Llywelyn ab Iorwerth) (c. 1173 – 1240), Prince of Gwynedd and ruler of most of WalesLlywelyn ap Maredudd ap Llywelyn ap Maredudd ap Cynan (died 1263), minor Welsh prince, last vassal Lord of MeirionyddLlywelyn ap Gruffudd (c. 1228 – 1282), the last crowned Welsh Prince of WalesLlywelyn ap Dafydd (c. 1260 – 1288), the heir to the Welsh crown imprisoned in 1283Llywelyn Bren (died 1318), nobleman who led a Welsh rebellion in 1316Llywelyn ap Gruffydd Fychan (1341–1401), Welsh landowner executed for assisting Owain Glyndŵr's escape from English forcesA number of Welsh language poets:Llywelyn Goch ap Meurig Hen (c. 1350 – 1390), Welsh poetLlywelyn ab Y Moel (died 1440), Welsh poetLlywelyn Siôn (c. 1540 – 1615), Welsh poetMore recent bearers of the surname include:
Carmen Llywelyn, American actress and photographerChris Llewellyn, American poetDavid Llewellyn (born 1978), Welsh author of ElevenDesmond Llewelyn (1914–1999), Welsh actor who played Q in several James Bond filmsGrace Llewellyn, American author of several books on homeschoolingLaurence Llewelyn-Bowen (born 1965), interior designer and television personalityLlewellyn (born Jamie Trott), New Age musicianMorgan Llywelyn (born 1937), U.S.-born Irish historical authorOlivia Llewellyn (born 1980), English actressRichard Llewellyn (1906–1983), English author of Welsh descentRobert Llewellyn (born 1956), English actor, presenter, and writerRoddy Llewellyn (born 1947), British landscape gardener, author, and television presenterRoger Llewellyn, British actorSylvia Llewelyn Davies (1866–1910), and her children (the "Llewelyn Davies boys"), namesakes of the characters in Peter PanSir William Llewellyn (1858–1941), English painter and President of the Royal AcademyEvan Henry Llewellyn (1847–1914), British politicianW. Llewelyn Williams (1867–1922), Welsh journalist, lawyer and politicianKarl Llewellyn (1893–1962), American jurisprudential scholar associated with the school of legal realismRoyce R. Lewellen, California Superior Court judgeBert Llewellyn (1939–2016), English footballerCarl Llewellyn (born 1965), Jockey and trainerCharlie Llewellyn (1876–1964), first non-white South African Test cricketerChris Llewellyn (born 1979), Welsh footballerGareth Llewellyn (born 1969), Welsh rugby union footballerHarry Llewellyn (1911–1999), British equestrian championSteve Llewellyn (1924–2002), Welsh rugby league footballerWillie Llewellyn, (1878–1973) Welsh international rugby captainJohn Dillwyn Llewelyn (1810–1882), Welsh botanist and photographerEdward Llewellyn-Thomas (1917–1984), Canadian professorPeter Rodney Llewellyn (born 1947), English businessman & international con artist.Doug Llewelyn (born 1938), original host of The People's CourtDavid Llewellyn (disambiguation) (multiple persons)Dafydd ap Llewelyn (disambiguation) (multiple persons)Reese J. Llewellyn (c. 1862–1936), Welsh-born American businessman.Bearers of the given name include:
Llewelyn Powys (1884–1939), British writerLlewellyn Woodward (1890–1971), British historianLlewelyn Wyn Griffith (1890–1977), Welsh novelistLlewellyn Xavier (born 1945), Saint Lucian artistLlewellyn Turner (1823–?), Welsh politicianLlewellyn Powers (1836–1908), member of the US House of Representatives from MaineLlewellyn Atherley-Jones (1851–1929), British politician and judgeLlewellyn Thompson (1904–1972), American diplomatLlewellyn Edwards (born 1935), Australian politician and chancellor of the University of QueenslandLlewellyn Thomas Smith (Llew Smith) (born 1944), Welsh politicianLlywelyn Williams (1911–1965), Welsh politicianLlewellyn H. Rockwell, Jr. (born 1944), American libertarian political commentatorLlewelyn "Alan" Curbishley (born 1957), English football manager for West Ham UnitedLlewelyn Kenrick (1847–1933), Welsh international footballerLlewellyn Herbert (born 1977), South African athleteLlewellyn Starks (born 1967), American long jumperLlewelyn Lewellin (1798–1878), British cleric and university educatorLlewellyn John Montfort Bebb (1862–1915), British academicLlewellyn Henry Gwynne (1863–1957), first Bishop of Egypt and SudanLlewelyn Alberic Emilius Price-Davies (1878–1965), British soldier and recipient of the Victoria CrossLlewellyn Ivor Price (1905–1980), Brazilian paleontologistLlewellyn Morris Chilson (1920–1981), United States Army career soldier who served heroically in the European Theater of OperationsLlewellyn Vaughan-Lee (born 1953), British Sufi mystic and authorSir Christopher Llewellyn Smith, British physicistLlewellyn Thomas, British physicist and applied mathematicianLlewelyn Williams (disambiguation) (multiple persons)Fluellen, a Welshman from Shakespeare's history Henry VLlewelyn Moss, a character in Cormac McCarthy's No Country for Old MenLlewelyn, a young archer in Valkyrie ProfileOfficer Francis Llewellyn 'Ponch' Poncherello, fictional character on the U.S. television series CHiPsCSI supervisor head of NYPD crime lab McKenna Llewellyn 'Mac' Taylor on the U.S television series "CSI:NY"Llewellyn, an anthropomorphic dragon from the comic Ozy and Millie.Jesper Llewellyn Fayhey, a character from Leigh Bardugo's Six of Crows duology.