Alonzo
Alonzo was the 511th most popular name for boys in 2025, given to 590 babies. Its best year was 1880, when it ranked 110th; the most babies were born in 2022 (651). Over the last ten years it has moved up 16 places. More babies were named Alonzo in the 2010s than in any other decade.
Meaning noble and ready (variant of Alfonso) · Germanic (Gothic), Spanish
Say it uh-LON-zoh /əˈlɑnzoʊ/
- Rank in 2025
- #511 boys, down 34 places since 2020
- Babies in 2025
- 590boys
- Girls and boys
- Almost always a boy’s name2021–2025
- Peak year
- 2022651 babies
- Total since 1880
- 46,109babies recorded
What does the name Alonzo mean?
Alonzo is a variant of Alfonso (Spanish Alonso), as Wiktionary notes. DMNES derives Alfonso from Gothic words meaning "noble" and "ready", and notes it was the name of many early kings of Spanish kingdoms. The -zo spelling has been used in English-speaking countries since the 19th century. Alfonso X, the 13th-century king of Castile known as "the Wise", is a famous bearer of the parent name.
*aþal (Gothic, “noble”)*funs (Gothic, “ready, eager”)
How sure is this? Probable. The Gothic elements are reconstructed.
Related names: Alfonso, Alonso, Alphonse, Lonnie.
See also: Germanic names, names that mean noble.
Sources for this meaning
- Wiktionary, entry 'Alonzo', Wiktionary (Wikimedia Foundation)
- Dictionary of Medieval Names from European Sources (ed. S. L. Uckelman), Edition 2023 no. 1, s.v. 'Alphonse', DMNES, Durham University
- Dictionary.com Unabridged (based on the Random House Unabridged Dictionary), with Collins English Dictionary, s.v. 'Alonzo', Dictionary.com / Random House / HarperCollins
- CMU Pronouncing Dictionary (cmudict), Carnegie Mellon University
Nicknames for Alonzo
The usual nicknames for Alonzo are Lonzo and Lonnie. Some parents skip the long form: for every 100 boys named Alonzo in the last five years, 15 were named Lonnie, against 39 twenty years earlier. Lonzo is also gaining on the full name.
Nicknames reviewed by our editors; counts are boys given the nickname as their legal first name. Nobody records how many Alonzos go by each one.
Alonzo popularity since 1880
A few girls are given the name too: 154 since 1927.
| Year | Rank (boys) | Babies (boys) |
|---|---|---|
| 2025 | #511 | 590 |
| 2020 | #477 | 626 |
| 2010 | #581 | 434 |
| 2000 | #516 | 435 |
| 1990 | #476 | 432 |
| 1980 | #431 | 363 |
| 1970 | #402 | 403 |
| 1960 | #367 | 464 |
| 1950 | #353 | 364 |
| 1940 | #357 | 256 |
| 1930 | #341 | 268 |
| 1920 | #332 | 308 |
| 1910 | #254 | 90 |
| 1900 | #182 | 116 |
| 1890 | #161 | 88 |
| 1880 | #110 | 122 |
How popular is Alonzo, counting every spelling?
Alonzo is the most common spelling of a name family that ranked #511 for boys in 2025 once every spelling is counted together. Together these spellings went to 590 boys in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Alonzo | 590 | #511 | 2,957 |
Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.
How many kids will share the name Alonzo?
590 of the 3,606,400 babies born in the US in 2025 were named Alonzo (0.16 per 1,000 births). For a boy named Alonzo born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 14 (of 430 pupils) would have a child named Alonzo.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Alonzo?
About 31,300 people born in the US named Alonzo are alive today, with a median age of 33; half are between 14 and 56. That makes Alonzo mostly worn by adults in their thirties to fifties. The wide spread shows a name popular in two different eras.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Alonzo by state
How common Alonzo was among boys born in each state in 2021–2025. It is notably more common than nationally in Nevada (2.4×), California (2.3×), Arizona (2.2×), Illinois (1.8×), Texas (1.6×). It is least common, relative to the national rate, in Louisiana, Kentucky, Minnesota.
Names with a similar history
These names rose and fell in step with Alonzo: their share of US boys followed the most similar curve since 1880. If you like Alonzo, they share its era and feel.
Middle names for Alonzo · Sibling names for Alonzo
Questions about the name Alonzo
What does Alonzo mean?
Alonzo means “noble and ready (variant of Alfonso)” (Germanic (Gothic), Spanish origin). Certainty: probable.
How popular is the name Alonzo?
Alonzo was the 511th most popular name for boys in 2025, given to 590 babies. Its best year was 1880, when it ranked 110th; the most babies were born in 2022 (651). Over the last ten years it has moved up 16 places. More babies were named Alonzo in the 2010s than in any other decade.
Is Alonzo a boy or girl name?
In 2021–2025, almost always a boy’s name given the name Alonzo in the US.
Where is Alonzo most popular?
In 2021–2025, Alonzo was most common in Nevada (0.82 per 1,000 boys), followed by California and Arizona.