Llewellyn is a surname, and may refer to:
A Adam Llewellyn (born 1989), Welsh animator, writer and director Andy Llewellyn (born 1966), English footballer Anthony Llewellyn (1933–2013), American chemist
B Bert Llewellyn (1939–2016), English footballer Brenna Llewellyn (born 1994), Canadian actress
C Carl Llewellyn (born 1965), Welsh jockey and racehorse trainer Caro Llewellyn (born 1965), Australian business executive and writer, daughter of Kate Llewellyn Charlie Llewellyn (1876–1964), South African cricketer Chris Llewellyn (born 1979), Welsh footballer and coach Chris Llewellyn (poet), American poet Clem Llewellyn (1895–1969), American baseball player, lawyer and judge Clive Llewellyn (born 1953), Canadian wrestler and lawyer
D David Llewellyn (academic administrator) (born 1960), Vice-Chancellor of Harper Adams University David Llewellyn (Australian politician) (born 1942), member of the Parliament of Tasmania David Llewellyn (author) (born 1978), Welsh novelist David Llewellyn (British politician) (1916–1992), British Member of Parliament David Llewellyn (golfer) (born 1951), Welsh golfer David Llewellyn (rugby union) (born 1970), Wales rugby union footballer David Llewellyn (trade unionist) (1907–1981), Welsh trade unionist and political activist Sir David Llewellyn, 1st Baronet (1879–1940), Welsh industrialist and financier Dai Llewellyn (Sir David Llewellyn, 4th Baronet) (1946–2009), Welsh socialite David Herbert Llewellyn (died 1864), doctor who went down with the CSS Alabama David Llewellyn (footballer) (born 1949), Welsh footballer Don Llewellyn (1919–2004), English chemist and founding vice-chancellor of University of Waikato Dorien Llewellyn (born 1996), Canadian water skier Dylan Llewellyn (born 1992), English actor
E Edward Llewellyn (trumpeter) (1879–1936), American trumpeter, cornetist and composer Edward Llewellyn, Baron Llewellyn of Steep (born 1965), British diplomat Edward Llewellyn-Thomas (1917–1984), English scientist, professor and (under Edward Llewellyn) science-fiction author Elizabeth Llewellyn (born 1974), English opera singer Ensley Llewellyn (1905–1989), American military officer Ernest Llewellyn (1915–1982), Australian violinist and conductor Evan Henry Llewellyn (1847–1914), British army officer and politician
F Fewlass Llewellyn (1866–1941), English actor, playwright and producer Frederick B. Llewellyn (1897–1971), American electrical engineer
G Gareth Llewellyn (born 1969), Welsh rugby union footballer Glyn Llewellyn (born 1965), Welsh rugby union footballer Grace Llewellyn (born 1964), American author of books on homeschooling Grant Llewellyn (born 1960), Welsh conductor Gwynfor Llewellyn (born 1958), Welsh television editor
H Harry Llewellyn (1911–1999), British equestrian
J J. Bruce Llewellyn (James Bruce Llewellyn) (1927–2010), American businessman Jaret Llewellyn (born 1970), Canadian water skier John Llewellyn (academic) (1915–1988), English chemist and academic administrator John Llewellyn (fencer) (born 1957), British fencer John Llewellyn (racing driver) (born 1954), British auto racing driver John Seys-Llewellyn (1912–2003), Welsh barrister
K Karl Llewellyn (1893–1962), American jurist Kate Llewellyn (born 1936), Australian poet and author Kevin Llewellyn (born 1978), American painter Kreg Llewellyn (born 1967), Canadian water skier
L Lewis Llewellyn (1881–1931), Welsh rugby union and rugby league footballer Livia Llewellyn, American short story horror writer Llewellyn Jones Llewellyn (1871–1934), Welsh physician and writer
M Max Llewellyn (born 1999), Welsh rugby union footballer Max Llewellyn (American football) (born 2002), American football player Mike Llewellyn (born 1953), Welsh cricketer Morgan Llewellyn (1937–2024), British Army officer Morris Llewellyn (fl.1555) English politician
O Olivia Llewellyn (born 1980), English actress
P Patricia Llewellyn (1962–2017), British television producer Paul Llewellyn (born 1957), Australian politician Paula Llewellyn, Jamaican lawyer Peggy Llewellyn (born 1972), American motorcycle drag racer Peter Rodney Llewellyn (born 1947), English businessman and con artist Phil Llewellyn (born 1947), Welsh rugby union footballer
R Rania Llewellyn, Canadian banker Raymond Llewellyn (born c.1930), Welsh actor Rebecca Llewellyn (born 1985), Welsh tennis player Rees Llewellyn (1851–1919), Welsh industrialist and public figure Reese J. Llewellyn (1862–1936), American businessman Reginald Llewellyn (1914–2000), British Royal Air Force flying ace of World War II Sir Rhys Llewellyn, 2nd Baronet (1910–1978), Welsh mining executive, soldier and author Richard Llewellyn (1906–1983), English author of Welsh descent Robert Llewellyn (born 1956), English actor, presenter, and writer Robert Llewellyn (photographer) (born 1945), American photographer Roddy Llewellyn (born 1947), British landscape gardener, author, television presenter and baronet Roger Llewellyn (1945–2018), British actor
S Sam Llewellyn (born 1948), British author Sammy Llewellyn (born 1951), Trinidad and Tobago football player Sheila Llewellyn (born 1948), novelist from Northern Ireland Stephen Peter Llewellyn (1913–1960), New Zealand soldier, historian and writer Steve Llewellyn (1924–2002), Welsh rugby union and rugby league footballer Suzette Llewellyn (born 1962), English actress
T Ted Llewellyn (1909–2002), Australian rules footballer Tom Llewellyn (1882–1956), Welsh rugby union and rugby league footballer Tony Llewellyn, Australian musician Trevor Llewellyn (1897–1981), Welsh boxer
W William Llewellyn (bishop) (1907–2001), British Anglican bishop William Llewellyn (painter) (1858–1941), Welsh painter and President of the Royal Academy William Llewellyn (priest) (1830–1907), Anglican priest William H. H. Llewellyn, American politician from New Mexico Willie Llewellyn (1878–1973), Welsh rugby union footballer
Y Yuki Okinaga Llewellyn (1939–2020), Japanese-American woman interned during World War II
See also Llywelyn (surname) Llywelyn (name) Llewelyn Lewellen (surname) Llewellin Llewellyn-Jones Llewellyn-Smith