Alonso
Masculine
Alonso is the Spanish form of Alfonso, a name carried by kings of Castile, León, Aragón and Portugal through the whole of the Middle Ages. Cervantes gave it to his hero — Don Quixote's real name is Alonso Quijano — and Shakespeare gave it to the King of Naples in The Tempest. Three syllables that open wide and land on a clean vowel: ah-LON-so.
How old is the name Alonso?
Alonso first appears in US birth records in 1915 — 110 years ago. The typical Alonso alive today was born around 2008, making them about 17 years old. About 11,500 people named Alonso are estimated to be alive in the US today.
When was the name Alonso most popular?
Alonso peaked in 2002, reaching #622 nationally. Today it ranks #785, 163 places below that high. See the whole 2002 chart.
Lists built from the same records:
Where it comes from
From Adefonsus to Alonso
The story of Alonso
The Visigoths brought the name into Iberia, where Latin scribes wrote it Adefonsus and a long line of Christian kings wore it as the peninsula's reconquest ground on for centuries. Ordinary Spanish speech wore the middle out of Alfonso, and by the late Middle Ages Alonso stood as its own everyday form — the version Cervantes reached for when he needed a plain gentleman's name for his hidalgo of La Mancha. It traveled with Spanish across the Atlantic and has been in American records since the early twentieth century, holding a modest, unbroken place ever since. Portuguese kept Afonso, Italian kept Alfonso, and English borrowed the z-spelling Alonzo.
Meaningscholars disagree
most often read as 'noble and ready' or 'ready for battle'
The name goes back to a Visigothic compound recorded in Latin as Adefonsus. The second element, funs, is agreed on: 'ready, eager'. The first is not — scholars variously read adal 'noble', hadu 'battle', or als 'all'. So 'noble and ready' and 'battle-ready' both have serious backing, and the record does not choose between them.
How the name formed
- Adefonsus
- Alfonso
- Alonso
Related forms: Alfonso · Afonso · Alonzo · Alphonse · Alfons · Adefonsus
Pronouncing Alonso
ah-LON-so
Stress on the middle syllable in both Spanish and English. Spanish keeps a pure 'oh' in the last syllable; English speakers often soften it, but the name survives either treatment without ambiguity.
Nicknames for Alonso
High
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1915
- Most boys named
- 2010380 — the highest on record
- Peak rank
- #622reached in 2002
- Change vs 2023
- +12.9%324 in 2025, from 287
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Alonso in other languages
The same name elsewhere
- Alfonso in Spanish/Italian — related form
- Afonso in Portuguese — related form
- Alonzo in English — spelling variant
- Alphonse in French — related form
- Alfons in German — related form
- Adefonsus in Latin — same name
Strongest US states over the last decade: California, Texas, Florida.
Alonsos among us
people named Alonso are estimated to be alive in the US today
About 1 boy in 5,272 born in 2025 was named Alonso
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
What happens to a name after it peaks
The Nancy test
Every popular name lives one long story — a climb, a peak, a slow settling back. Alonso's later chapters haven't been written yet, so we borrowed them: Nancy climbed just as high around 1938, and its whole arc is on record. Line the two peaks up, and Nancy's path sketches the road Alonso is walking now.
Alonso sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Where Alonso is headed
Alonso should hold steady through 2030 — the curve is flat, and flat curves are the most predictable kind.
High confidence — fitted on official counts through 2025.
A damped-trend projection of the official birth data — a sketch of momentum, not a promise. Every name's forecast, ranked.
Alonso beside its neighbors
The names ranked closest to Alonso in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- Reads and sounds the same in Spanish and English — no translation, no re-teaching when the name crosses between households or countries.
- Every letter is pronounced, so a stranger can say it correctly from the page on the first try.
- A documented line running from Visigothic Iberia through medieval kings to Cervantes, unbroken and easy to point to.
- Several established short forms already in real use — Alo, Lonso, Al — rather than nicknames a family has to invent.
- Alonso and Alonzo have coexisted for centuries in the United States, and the z-spelling is well established here. Expect a lifetime of confirming which one it is on forms and in emails.
- Alonso is also a widespread Spanish surname. On alphabetised lists and official paperwork it will sometimes be filed or read as a last name.
- It stays uncommon in American classrooms — a child is unlikely to share it, which cuts both ways depending on how much a family values a name being instantly familiar to teachers.
Nobody names a baby alone.
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Alonso
Masculine · #785 in the U.S.
Frequently asked
- How many Alonsos are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 11,500 people named Alonso are estimated to be alive in the US today.
- How popular is the name Alonso in 2025?
- Alonso ranks #785 among US boy names in 2025, with 324 babies given the name.
- How rare is the name Alonso?
- About 1 in every 5,272 US boys born in 2025 was named Alonso — 324 in all.
- Will my child share the name Alonso with classmates?
- Alonso will almost certainly be the only one in school.
Ranked beside Alonso
Names sitting at a similar level of popularity right now.
Jamison#785 · Tony#783 · Skyler#783 · Remi#787 · Darius#788 · Elisha#788 · Blaze#781 · Kyree#781
Looking for what else is popular rather than what resembles Alonso? See the current top 100.
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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