Bonn

Значение (English)

Bonn (an independent city in North Rhine-Westphalia, Germany; historical capital of West Germany)

Произносится как (IPA)

/bɔn/

Этимология (English)

Inherited from средневерхненемецкий: Bonne

Inherited from древневерхненемецкий: Bunna

In summary

From Middle High German Bonne, Bunne, from Old High German Bunna, from Proto-West Germanic *Bunnā, from Latin Bonna, short for Castra Bonnensia. The Germanic form shows its very old age in the replacement of -o- with -u-, which then also failed to undergo a-mutation because of the following nasal geminate. The modern German -o- is per se a regular development (cf. Sonne, Wonne), but was likely reinforced by readaptation to the Latin.
Another theory has it related to the tribe Eburones. Folk etymology has proposed origin from dedication to Saint Boniface, but this is a crass anachronism. During the Middle Ages, Bonn was often called Verona in Latin texts.