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Phi-bô-na-xi
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Vietnamese
Etymology
vi it Fibonacci. The Italian phoneme /tʃ/ is generally rendered as the Vietnamese letter x and phoneme /s/, as if the Italian letter c was supposed to be pronounced like a "soft c" in vi fr -. Compare vi Lê-ô-nác-đô đa Vin-xi Leonardo da Vinci, vi Xi-xi-li-a Xi-xi-li-a Sicilia. French also influences how German names are rendered in Vietnamese.
Proper noun
Fibonacci
vi dãy số Phi-bô-na-xi the Fibonacci sequence
vi Individuals