Alphonsus is a masculine given name and surname which may refer to:

Given name

  • Alphonsus Carroll (1895–1974), New Zealand dual-code international rugby union and rugby league footballer
  • Alphonsus Cassell (1949–2010), aka Arrow (musician), Montserratian calypso and soca musician
  • Alphonsus Ciacconius (1530–1599), Spanish Dominican scholar
  • Alphonsus Cullinan (born 1959), Irish Roman Catholic prelate and Bishop of Waterford and Lismore
  • Alphonsus Rick Doerr (born 1960), American Paralympic sailor
  • Alphonsus J. Donlon (1867–1923), American Jesuit
  • Alphonsus F. D'Souza (1939–2016), Indian Jesuit priest and Roman Catholic bishop
  • Alphonsus Ebuka (born 2001), Nigerian footballer
  • Fonse Faour (born 1951), Canadian politician
  • Alphonsus de Guimaraens (1870—1921), Brazilian poet
  • Alphonsus Obi Igbeke (born 1962), Nigerian politician
  • Alphonsus Gerald Irona, 21st century Nigerian politician
  • Alphonsus Longgap Komsol, 21st century Nigerian politician
  • Alphonsus Liguori (1696–1787), Roman Catholic Saint
  • Alphonsus Mathias (1928–2024), Indian Roman Catholic archbishop
  • Alphie McCourt (1940–2016), Irish-American writer
  • Alphonsus Uche Mefor (born 1972), British-Nigerian pro-Biafra political activist
  • Alphonsus Nwosu (born 1944), Nigerian politician, parasitologist, academic, administrator and former Minister of Health
  • Alphonsus Liguori Penney (born 1924), Canadian Roman Catholic priest
  • Alphonsus Josephus de Ridder (1882–1960), pen name Willem Elsschot, Belgian writer and poet
  • Alphonsus Rodriguez (1532–1617), Spanish Jesuit and saint
  • Alphonsus a Sancta Maria (1396–1456), Spanish historian
  • Alphonsus Salmeron (1515–1585), Spanish biblical scholar, Catholic priest and one of the first Jesuits
  • Alphonsus Augustus Sowada (1933–2014), American Roman Catholic bishop, cultural anthropologist and bishop
  • Alonso Tostado (c. 1410–1455), also known as Alphonsus Tostatus, Spanish theologian, councillor of John II of Castile and briefly bishop of Ávila

Surname

  • Aniekeme Alphonsus (born 1999), Nigerian sprinter and middle-distance runner
  • Joy Alphonsus (born 1987), Nigerian-born actress

See also

  • Petrus Alphonsi (or Petrus Alfonsus) (1062–1110), Spanish Jewish writer
  • St. Alphonsus Church (disambiguation)