'''William''', '''Willie''', '''Bill''', or '''Billy Thomas''' may refer to:
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==Academics== * W. I. Thomas (William Isaac Thomas, 1863–1947), American sociologist * William Jenkyn Thomas (1870–1959), Welsh headmaster and author * William Davies Thomas (1889–1954), Welsh literary scholar * William G. Thomas III (born 1964), American historian * William Thomas (historian) (1936–2025), British historian * C. William Thomas<!-- also Bill -->, American accounting academic
==Arts and entertainment== ===Literature=== * William Moy Thomas (1828–1910), English journalist, literary editor and novelist * William Thomas (Islwyn) (1832–1878), Welsh poet * William Thomas (Gwilym Marles) (1834–1879), Welsh poet * William Hannibal Thomas (1843–1935), American teacher, journalist, judge, writer and legislator * William Beach Thomas (1868–1957), British author and journalist * William F. Thomas (1924–2014), American newspaper editor
===Performing arts=== * William C. Thomas (1903–1984), American film producer * Willie B. Thomas (1912–1977), American blues musician * Bill Thomas (costume designer) (1921–2000), American costume designer * Billie "Buckwheat" Thomas (William Thomas Jr., 1931–1980), American actor * Willie Thomas (trumpeter) (1931–2019), American jazz trumpeter and educator * William Thomas Jr. (1947–2020), American actor * Bill Thomas (actor) (born 1952), English actor * Billy Thomas (drummer) (born 1953), American drummer with McBride & the Ride * William Thomas (actor) ({{floruit|since 1974}}), Welsh actor * Billie Geter Thomas (William Bryan Geter Thomas, 1902–1962), American educator and actress
===Visual arts=== * William Thomas (architect) (1799–1860), Anglo-Canadian architect * William Tutin Thomas (1829–1892), Anglo-Canadian architect * Bill Thomas (American writer, born 1934) (1934–2009), American author and photojournalist
==Business and industry== * William Bevil Thomas (1757–1825), Newfoundland merchant and land developer * William Kyffin Thomas (1821–1878), Australian newspaper proprietor * William Luson Thomas (1830–1900), British wood-engraver and newspaper proprietor * William Thomas (miller) (1838–1891), Australian flour mill industrialist * William Winstead Thomas (1848–1904), American insurance company president and architect * Sir William James Thomas, 1st Baronet (1867–1945), Welsh industrialist and philanthropist * Bill Thomas (businessman) (born 1959), British business executive
==Law and politics== ===Australia=== * William Thomas (Australian settler) (1793–1867), Australian colonist * William Thomas (Victorian politician) (1869–1924), Victorian politician * William Lemen Thomas (1872–1921), Western Australian politician * Bill Thomas (Australian politician) (born 1950), Western Australian politician
===UK=== * William Thomas (MP for Old Sarum and Downton) (died 1554), Welsh MP for Old Sarum and Downton * William Thomas (MP for Caernarvonshire) (died 1586), English politician, MP for Caernarvonshire, 1574–86 * William Thomas (MP for Carnarvon) (died 1653), Welsh politician * William Thomas (MP for Ludgershall) (1630–1686), English lawyer and politician * Sir William Thomas, 1st Baronet (1641–1706), English politician * Sir William Thomas, 2nd Baronet (died 1777), a Thomas baronet of Yapton * Sir William Thomas, 4th Baronet (1777–1850), a Thomas baronet of Yapton * Sir William Thomas, 5th Baronet (1807–1867), a Thomas baronet of Yapton * Russell Thomas (politician) (William Stanley Russell Thomas, 1896–1957), British politician
===US=== * W. C. E. Thomas (William C. E. Thomas, 1818–1876), American civic leader * William H. Thomas (Wisconsin politician) (1821–1898), American politician * William W. Thomas Jr. (1839–1927), American diplomat and politician from Maine * William H. Thomas (Alabama judge) (1867–1945), associate justice of the Alabama Supreme Court * William H. Thomas (Maryland judge) (c. 1861–1924), judge of the Maryland Court of Appeals * William Hannibal Thomas (1843–1935), American teacher, journalist, judge, writer and legislator * William Reuben Thomas (1866–1943), American civic leader * W. Aubrey Thomas (1866–1951), US representative from Ohio * William M. Thomas ({{floruit|1868–1876}}), African-American politician in South Carolina * William D. Thomas (1880–1936), American politician * William Kernahan Thomas (1911–2001), American judge * William Henry Thomas (1920–2009), American politician from Maryland * Bill Thomas (Montana politician) (born 1935), American politician in Montana House of Representatives * Bill Thomas (born 1941), US representative from California * Bill Thomas (American writer, born 1943), American legal and political author * Bill Thomas (Alaska politician) (born 1947), American politician in Alaska House of Representatives * William L. Thomas (born 1967), American jurist
===Elsewhere=== * William Fitz Thomas ({{floruit|1415–1438}}), Irish judge * William Thomas (Newfoundland politician) (1785–1863), Newfoundland politician * William Howell Arthur Thomas (1895–1979), Canadian MP
==Military== * William ap Thomas (died 1445), Welsh soldier and sheriff * William Holland Thomas (1805–1893), American Confederate army officer * William Nathaniel Thomas (1892–1971), US Navy Chief of Chaplains * William Bain Thomas (1898–1967), British Army officer * William Garfield Thomas Jr. (1916–1942), American naval officer * William Waffle Thomas (1919–2014), American air force officer, former Air Force One pilot * William H. Thomas (Medal of Honor) (1923–1945), American soldier
==Religion== * William Thomas (bishop of Worcester) (1613–1689), Welsh Anglican bishop of Worcester * William Thomas (antiquary) (1670–1738), English Anglican priest and antiquary * William Thomas (chancellor of Llandaff Cathedral) (1734–1799), Welsh Anglican priest and scholar * William Griffith Thomas (1861–1924), English Anglican priest and theologian * William Jones Thomas (1811–1886), Welsh Anglican priest * William M. M. Thomas (1878–1951), American Episcopal bishop of the Missionary District of Brazil * William Nathaniel Thomas (1892–1971), American Methodist minister and US Navy Chief of Chaplains * William S. Thomas (1901–1986), American Episcopal suffragan bishop of the Diocese of Pittsburgh * William Thomas (archdeacon of Northumberland) (1927–2020), English Anglican priest * Bill Thomas (priest) (born 1943), British Anglican archdeacon of Llandaff
==Sports== ===American football=== * William A. Thomas (1948–2019), American football coach * Bill Thomas (American football) (born 1949), American football player * Willie Thomas (Canadian football) (born 1955), Canadian football player * William Thomas (linebacker) (born 1968), American football player * Tra Thomas (William Thomas III, born 1974), American football player
===Association football (soccer)=== * William Thomas (footballer, born 1885) (1885–?), English soccer player * Billy Thomas (footballer, born 1903) (1903–1992), Welsh footballer * Bill Thomas (New Zealand footballer) ({{floruit|1923}}), New Zealand footballer
===Australian rules football=== * Bill Thomas (Australian footballer) (1886–1974), Australian rules footballer * William "Digger" Thomas (1890–1953), Australian rules footballer * Billy Thomas (Australian footballer) (1902–1968), Australian rules footballer * Bill Thomas (footballer, born 1930), Australian rules footballer
===Rugby=== * Willie Thomas (rugby union) (1866–1921), Welsh rugby union footballer * William Llewellyn Thomas (1872–1943), Welsh rugby union footballer * Willie Thomas (rugby league) (1881–1963), Welsh rugby league footballer * Billy Thomas (rugby league) (1907–1972), Welsh rugby league footballer * Billy Thomas (rugby union) (1933–2013), Welsh rugby union player
===Other sports=== * Bill Thomas (baseball) (1877–1950), American baseball player * Bill Thomas (sailor) (1918–1982), Canadian sailor * Will Thomas (bowls) (William Thomas, born 1954), Welsh lawn and indoor bowler * William Thomas (cricketer) (born 1960), English cricketer * William Thomas (karateka) (born 1965), English karateka * William Godfrey Thomas (1915–1982), Australian rower and rowing coach * Billy Thomas (basketball) (born 1975), American basketball player * Bill Thomas (ice hockey) (born 1983), American ice hockey player * Will Thomas (basketball) (William Thomas, born 1986), American basketball player * Bill Thomas (basketball) (1931–2023), American college basketball player and coach * Bill Thomas (cricketer) (1921–2000), English cricketer and schoolmaster
==Others== * William Thelwall Thomas (1865–1927), Welsh surgeon * Wilhelm Meyer (Adolph Beck case) (a.k.a. William Thomas, {{floruit|{{circa|1903}}}}), gained notoriety in Adolph Beck case * William Thomas (activist) (1947–2009), American anti-nuclear activist * William H. Thomas (physician) (born 1959), American physician
==See also== * Will Thomas (disambiguation) * William Thomas Jr. (disambiguation) * {{in title}}
{{human name disambiguation|Thomas, William}}