🇵🇹 Portugal · Girl names
Portuguese Girl Names Starting with O
🇵🇹 Portugal has 43 registered Portuguese girl names starting with the letter O, including Oana, Oceana, Oceane, Ociana, Octávia. Each name on this list complies with Portugal's naming law as administered by the IRN, meaning parents can register their baby with any of these names without legal pushback. Use this page to browse, then click any name to see its full legal profile, regional variants, and registration tips. For an overview of all naming rules in Portugal, visit our Portugal country guide.
43
Names starting with O
3757
Total girl names
IRN
Naming authority
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All 43 Portuguese girl names starting with O
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FAQ
How many Portuguese girl names start with O?
There are 43 Portuguese girl names beginning with the letter O in our EuroNameCheck database, out of 3757 total Portuguese girl names registered with the IRN.
Are these names legally registrable in Portugal?
Yes. Every name on this page is drawn from publicly accepted Portuguese naming practice and the IRN register. Spelling, accents and length all comply with Portugal's naming law. Always confirm with your local registry office before registration.
What is the most popular Portuguese girl name starting with O?
Oana is a leading Portuguese girl name starting with O in our database of 43 options. For real-time popularity rankings, see our Portugal top names page.
Check a name in Portugal
Run any of these names through our free legality checker — covers all 25 European countries.
Check a Name →Last updated: 2026-05-13. For informational purposes only. Always consult your local IRN for definitive answers.