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“Variant of Alfonso — noble and ready (Germanic adal + funs)” — Germanic, via Spanish Alfonso origin
Boy's name · #511 in the US (2025) · Timeless
Few names move less than Alonzo — on the books since 1880, #511 in 2025, and dependable in between. Roughly 46,000 boys share it. In all that time it has never once missed a year of the national records. Its center of gravity has moved: strongest in the South in the 1940s and 1950s, strongest in the West today. Lonnie is a short form of Alonzo. Together with its spelling variant Alonso (#785), Alonzo would rank around #358 with about 910 births last year — the newborns split about 65/35 between Alonzo and Alonso.
Around the world: about 1 in 7,900 boys in Canada (2024) · about 1 in 12,000 boys in France (2025) · about 1 in 18,000 boys in England & Wales (2025).
Appears in 2020-2025 birth records of 34 states. See the full state-by-state map on this page.
Among 271 notable people named Alonzo:
Military figures appear 2.47× more often than among typical names — e.g. Alonzo Garcelon, Union Army general, politician (1813-1906).
Similar names: Alonso · Lewis · Alfred · Vincenzo · Byron · Alvin
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