# Fibonacci

> English word · Proper noun · IPA /fiːbə(ʊ)ˈnɑːtʃi/ · frequency rank #42,132

## Definitions
1. A surname from Italian.

## Etymology
From Latin filius (“son”) + Italian Bonacci, a diminutive of Bono, from Latin bonum, ultimately meaning literally, "son of the (little) good man."

## Common misspellings (11)
`fbionacci`, `ffibonacci`, `fibbonacci`, `fibnoacci`, `fiboancci`, `fibonaci`, `fibonacic`, `fiboncaci`, `fibonnacci`, `fiobnacci`, `ifbonacci`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/fibonacci