Given name · also Provençal
Aloysius
Aloysius is a masculine given name from Occitan.
Original GermanAlois
Meaning & origin
Where it comes from
A possible origin is Provençal, although the derivation remains uncertain.
How it developed
From Occitan Aloys; its root is Proto-Indo-European *ḱlew-.
Adapted from Wiktionary (CC BY-SA 4.0)
The story
Published U.S. birth records include this spelling as early as 1880. This is the earliest published observation available here, rather than a date for the name’s origin.
From dated birth records
Aloysius through the years
- Babies since 1880
- 5,724
- 5,724 boys · 0 girls
- Most popular year
- 1916
- 199 babies
- 2025
- 20
- #4,864 for boys
- 2021–25 vs 2016–20
- +1%
- Steady
By the numbers
In 2025, this name appeared in 20 U.S. birth records for boys, ranking No. 4,864 among boys’ names. Average annual use for boys was 1.0% higher in 2021–2025 than in 2016–2020. Published U.S. population figures for this spelling include 1,749 as a first name in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Aloysius’s family of names
In English usage, Aloysius has a diminutive in Lewie. In English usage, Aloysius shares an earlier linguistic root with Louis. In English usage, Aloysius has a conventional equivalent in the Italian form Luigi.
Inner ring: nicknames and forms · outer: across languages.
Around the world
Aloysius has relatives in 17 languages. Lines run from its German roots to each of them.
Germanwhere Aloysius comes from · 1 name
Nicknames & forms 12
Diminutives, pet forms, short forms and variants used alongside the name.
- Aloisvariant · German, Czech
- Aloysvariant
- Aloisiusvariant
- Lewiediminutive · English
- Alloysiuslikely variant
- Weeshienickname · English
- Ludovicusvariant · Latin
- Alojzyvariant · Polish
Show 4 moreShow fewer
Across languages 27
Equivalents and cognates in other languages, plus older forms it grew from.
- Luisequivalent
- Louisdoublet · English
- Loisequivalent
- LuigiItalian
- Aloisefeminine form
- LisiSicilian
- Laojzekequivalent
- Aloyzasequivalent
Show 19 moreShow fewer
- Alewissderivative · gsw
- AloísioPortuguese
- Aloisiafeminine form · Italian
- Liudvikasdoublet · Lithuanian
- Aloikirelated form
- Aloysioequivalent
- Luísequivalent
- Λούηςequivalent
- Alviseequivalent
- Alojsequivalent
- AloisiôVietnamese
- LojzeSlovene
- AlojzSlovene, Slovak
- AluìsiuSicilian
- LuiciSicilian
- АлоизRussian
- AloizsLatvian
- AlajosHungarian
- AloïsFrench
People named Aloysius
- Louis van GaalDutch footbal player and manager (born 1951)
- Aloysius BertrandFrench poet (1807–1841)
- Aloysius AmbrozicCanadian Roman-Catholic priest cardinal (1930–2011)
- Aloisius Joseph MuenchCatholic cardinal (1889-1962)
- Aloysius Jin LuxianChinese bishop (1916–2013)
- Aloysius Maryadi Sutrisnaatmaka21st-century Indonesian Catholic bishopborn 1953
- Aloysius MurwitoIndonesian catholic priestborn 1950
- Aloysius PangSingaporean actor1990–2019
- Aloysius Ferdinandus ZichemSurinamese Roman Catholic bishop (1933–2016)
Characters named Aloysius: Aloysius Pendergast (fictional character).
Listed by how widely each person is written about, which says nothing about the name itself.
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