Alonzo
Meaning
“American English variant of Alonso, ultimately from Germanic elements meaning 'noble' and 'ready'”
The story
Alonzo is the American English variant of Spanish Alonso, itself a form of Alfonso; its distant Germanic elements carry the traditional senses noble and ready. The z is not the old Iberian spelling but an American branch, and basketball center Alonzo Mourning gave that branch a Hall of Fame bearer in 2014. Its US record is long, but not flat: the decade totals move from a low of 808 in the 1900s to 5,251 in the 2010s, with about 3,580 so far this decade. Across the published series, about 44,900 boys and 150 girls appear. That continuity matters more than a claim of no wave: Alonzo has changed scale several times while remaining visible in every decade of the record. Three vowels keep the old name open; one consonant marks its American path.
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Alonzo peaked in the 2000s and the 2020s in nearly equal measure.
See popularity in Brazil
Popularity in Brazil
88 people · the #45,127 first name in Brazil · median age 18
Source: IBGE, Censo Demográfico 2022
When you meet Alonzo
People given the name Alonzo in the United States span the generations: the middle half were born anywhere from 1960 to 2019. Age is the one thing the name won't tell you.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Alonzo deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Alonzo truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Alonzo fits with your family’s names and surname.
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