Proper Nouns That Start with O and End with O

Explore 9 verified English proper nouns that start and end with O, including Orlando, Oslo, Owo, Oporto, Orinoco, Oto and Omo. Sort these capitalized names for specific people, places, and organizations by word length for capitalization practice, trivia, and reference writing below, or review capitalization rules and examples in our noun grammar guide.

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Starts with OK
1 words
okavango
Starts with OM
1 words
omo
Starts with OP
1 words
oporto
Starts with OR
2 words
orlando
orinoco
Starts with OS
1 words
oslo
Starts with OT
2 words
oto
ottocento
Starts with OW
1 words
owo

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