Alphonso or Alfonso is a masculine given name and occasional nickname which may refer to:

Aristocrats

Iberia

  • Alfonso I of Aragon (1104–1134), known as (The Battler)
  • Alfonso I of Asturias (739–757)
  • Alfonso II of Aragon (1162–1196)
  • Alfonso II of Asturias (791–842)
  • Alfonso II of Naples (1448–1495)
  • Alfonso III of Aragon (1285–1291)
  • Alfonso III of León (866–910)
  • Alfonso IV of Aragon (1327–1336)
  • Alfonso IV of León (925–931)
  • Alfonso V of Aragon (1416–1458), also king of Naples and Sicily
  • Alfonso V of León (999–1028)
  • Alfonso VI of León (1065–1109)
  • Alfonso VII of León (1126–1157)
  • Alfonso VIII of Castile (1158–1214)
  • Alfonso IX of León (1188–1230)
  • Alfonso X of Castile (1252–1284)
  • Alfonso XI of Castile (1312–1350)
  • Alfonso XII of Spain (1857–1885) (ordinal numbering continues from the kings of Castile)
  • Alfonso XIII of Spain (1886–1931)
  • Alfonso Fróilaz, briefly king of the unified kingdom of Asturias, Galicia and León in 925
  • Alfonso, Prince of Asturias (1453–1468), figurehead of rebelling magnates against his brother King Henry IV of Castile
  • Infante Alfonso of Spain (1941–1956), younger brother of King Juan Carlos of Spain
  • Alfonso of Spain, Prince of Asturias, heir apparent of the throne of Spain

Elsewhere

  • Alfonso I d'Este (1476–1534), Duke of Ferrara
  • Alfonso II d'Este (1533–1597), Duke of Ferrara
  • Alfonso II, Count of Provence (1180–1209), second son of Alfonso II of Aragon
  • Alfonso III d'Este (1591–1644), Duke of Modena and Reggio
  • Alfonso of Capua (c. 1120 – 1144), Prince of Capua
  • Prince Alfonso, Count of Caserta (1841–1934), Duke of Calabria and head of the royal house of the Two Sicilies
  • Prince Alfonso of Hohenlohe-Langenburg (1924–2003), Spanish playboy and businessman
  • Alfonso Jordan (1103–1148), Count of Tripoli, Count of Rouergue, Count of Toulouse, Margrave of Provence and Duke of Narbonne
  • Infante Alfonso, Duke of Calabria (1901–1964), claimant to the title of the head of the House of Bourbon-Two Sicilies
  • Alphonso, Earl of Chester (1273–1284), first son of Edward I of England, heir apparent to the English throne
  • Prince Alfonso of Liechtenstein (born 2001), grandson of Hans-Adam II

Others

  • Alfonso of Valladolid (c. 1270 – c. 1347), Jewish convert to Christianity, philosopher, and mathematician
  • Alphonso Calhoun Avery (1835–1913), American lawyer, Confederate military officer, and politician
  • Alphonso Boone (1796–1850), American pioneer in what is now Oregon
  • Alfonso Calderon (activist) (born 2001), Spanish-born American gun control activist
  • Alfonso Calderón (poet) (1930–2009), Chilean poet and writer
  • Al Campbell (born 1954), Jamaican reggae singer
  • Alphonso Carreker (born 1962), American former National Football League player
  • Alfonso Cuarón (born 1961), Mexican cinematographer
  • Alphonso Giovanni Giuseppe Roberto D'Abruzzo, birth name of Robert Alda (1914–1986), American actor
  • Alphonso Joseph D'Abruzzo, birth name of Alan Alda (born 1936), American actor, son of Robert Alda
  • Alphonso Davies (born 2000), Ghanaian-born Canadian soccer player
  • Mike Espy (born 1953), American lawyer and politician
  • Alphonso Ford (1971–2004), American basketball player
  • Alphonso Gerard (1916–2002), American Negro league baseball player
  • Alphonso Jackson (born 1945), American politician, United States Secretary of Housing and Urban Development
  • Alphonso Johnson (born 1951), American jazz bassist
  • Buck Johnson (born 1964), American former basketball player
  • Alfonso Lizarazo (born 1940), Colombian host and politician
  • Alphonso Lingis (1933–2025), American philosopher, writer, and translator
  • Alphonso Lisk-Carew (1883–1969), Sierra Leonean photographer
  • Alphonso M. Lunt (1837–1917), Union Army sergeant awarded the Medal of Honor
  • Alphonso McAuley, 21st century American actor
  • Alfonso Mejia-Arias (born 1961), Mexican musician, writer, social activist, and politician
  • Alfonso Oiterong, Palauan politician, vice president
  • Alfonso Pérez (born 1972), Spanish former footballer
  • Alfonso Pérez (boxer) (born 1949), Colombian former boxer
  • Alfonso Quiñónez Molina (1874–1950), Salvadoran politician, physician, and president (1913–1914, 1918–1919, 1923–1927)
  • Alfonso Ribeiro (born 1971), American actor and game show host
  • Alphonso Theodore Roberts (1937–1996), Vincentian political activist and cricketer
  • Alfonso John Romero (born 1967), American video game designer
  • Alphonso Sgroia (1886–1940), New York City gangster and murderer
  • Alphonso Smith (born 1985), American former National Football League player
  • Alphonso C. Smith (1894–1945), Canadian politician
  • C. Alphonso Smith (1864–1924), American English professor, college dean, philologist, and folklorist
  • Alfonso Soriano (born 1976), American Major League Baseball player
  • Alphonso Sumner, African American newspaper publisher and abolitionist who opened the first Black school in Nashville, Tennessee in 1833
  • Alphonso Taft (1810–1891), American jurist, diplomat, and politician, United States Attorney General and Secretary of War under President Ulysses S. Grant, father of President William Howard Taft
  • Alphonso Wilson (1860–1936), African-American activist
  • Alphonso Wood (1810–1881), American botanist and theology instructor

Nickname

  • Alphonso Cox (1908–1964), American Negro League pitcher
  • Alphonso Sharland, member of the pop-rock band The Hoosiers

Fictional characters

  • Don Alfonso, in Mozart's opera
  • Alphonso, protagonist in , an opera by Franz Schubert
  • Alphonso Ali, a minor character in the comic strip Bloom County
  • Alfonzo Dominico Jones, a dog in the Australian television series SeaChange
  • Al MacKenzie, a Marvel Comics character
  • Alfonso "French" Sosa, a main character from The OA, an American television series

See also

  • "Alfonso" (song), a 2013 song by Levante
  • Alphonsus Liguori (1696–1787), Roman Catholic theologian
  • Alphons
  • Alphonse