Where does “trombonau” come from?

trombonau (Welsh) comes from Welsh trombôn, from English trombone, from Italian trombone, from Italian -one, from Latin -ō, from Proto-Indo-European -ō — Derives nouns from roots.

Ancestry of “trombonau”, step by step

StepLanguageWordMeaning
1Welshtrombôntrombone
2EnglishtromboneA musical instrument in the brass family, having...
3Italiantrombonetrombone; trombonist; An annoying and boring...
4Italian-oneAlterative suffix used to form augmentatives;...
5Latinsuffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
6Proto-Indo-EuropeanDerives nouns from roots
Every word from Proto-Indo-European Every word from Latin Every word from Italian -one