Aloysius (/ˌæloʊˈɪʃəs/ AL-oh-ISH-əs) is a given name.

Look up aloysius in Wiktionary, the free dictionary.

It is a Latinisation of the names Alois, Louis, Lewis, Luis, Luigi, Ludwig, and other cognates (traditionally in Medieval Latin as Ludovicus or Chlodovechus), ultimately from Frankish *Hlūdawīg, from Proto-Germanic *Hlūdawīgą ("famous battle"). In the US, the name is rare, with fewer than 0.001% of babies receiving the name since the 1940s. Most of those were Roman Catholics.^[1]

• Aloysius Ambrozic (1930–2011), Roman Catholic cardinal
• Aloysius Bertrand (1807–1841), French Romantic poet, playwright, and journalist
• Aloysius Foster (born 1943), American jazz drummer
• Aloysius Gonzaga (1568–1591), Italian aristocrat and saint
• Aloysius John Jordan (1906–1957), English rugby league footballer who played in the 1930s
• Aloysius Leo Knott (1829– 1918), American politician, lawyer and educator
• Aloysius Lilius (1510–1576), Italian doctor, astronomer, philosopher and chronologist
• Aloysius Pang (1990–2019), Singaporean actor
• Aloysius Pieris (born 1934), Sri Lankan Sinhala Jesuit priest
• Aloysius Schmitt (1909–1941), Roman Catholic priest
• Aloysius Stepinac (1898–1960), Yugoslav Croat prelate
• Aloysius Szymanski (1902–1956), given name for Baseball Hall of Famer Al Simmons
• Aloysius Paulus Maria van Gaal (born 1951), given name for Dutch football manager Louis van Gaal
• Aloysius John Wycisło (1908–2005), American prelate of the Roman Catholic Church who served as the eighth bishop of the Diocese of Green Bay

• Alo Creevey, in the UK television series Skins
• Aloysius T. McKeever, hobo squatter in the 1947 Christmas film It Happened on Fifth Avenue
• Aloysius O'Hare, villain of the 2012 film The Lorax
• Aloysius Parker, the chauffeur of Lady Penelope Creighton-Ward in the 1960s TV series Thunderbirds
• Aloysius Pendergast, protagonist of several novels by Douglas Preston and Lincoln Child
• Aloysius K. Randall, protagonist in the war film Wake Island (film)
• Aloysius Samberly, a season 2 recurring character on the television series Agent Carter
• Aloysius Snuffleupagus (Mr. Snuffleupagus), on Sesame Street
• Aloysius (teddy bear), in Evelyn Waugh's 1945 novel Brideshead Revisited
• Sister Aloysius, in the play Doubt: A Parable and the film adaptation Doubt
• Aloysius, an anthropomorphic wolf in Highlights magazine features

• St Aloysius' College