Twin Names Starting With O
13 US twin names beginning with O, each linking to scored twin name pairings. Sorted A–Z; switch to popularity below.
- Oakley Best twin match: Winter (97) middle names
- Oaklynn Best twin match: Nyla (90) middle names
- Octavia Best twin match: Alexandra (94) middle names
- Olive Best twin match: Poppy (97) middle names
- Oliver Best twin match: Julian (97) middle names
- Olivia Best twin match: Elizabeth (93) middle names
- Omar Best twin match: Leonel (95) middle names
- Onyx Best twin match: Zander (97) middle names
- Ophelia Best twin match: Evangeline (97) middle names
- Orion Best twin match: Selena (90) middle names
- Oscar Best twin match: Molly (89) middle names
- Otto Best twin match: August (95) middle names
- Owen Best twin match: Dylan (96) middle names
No names match those filters.
O names by the numbers
In 2025, 2.23% of US baby boys and 1.69% of baby girls in the Social Security records got a first name starting with O. In 1990 the figures were 0.44% and 0.32%.
| Name | For | Rank in 2015 | Rank in 2025 |
|---|---|---|---|
| Oliver | boys | #19 | #3 |
| Owen | boys | #36 | #31 |
| Oscar | boys | #181 | #223 |
| Olivia | girls | #2 | #1 |
| Oaklynn | girls | #3,019 | #153 |
| Olive | girls | #264 | #197 |
The biggest climber on this page is Oaklynn: #3,019 among US girls in 2015, #153 in 2025.
Twin names that share a first letter are marked down on the twin pages, since forms often list twins by first initial and surname alone.
Twin Names starting with O
This page lists 13 twin names beginning with the letter O that are in real current use in the United States — including popular picks like Olivia, Oliver, Owen. The count comes from US Social Security Administration public records: every name shown was given to at least a handful of US babies in the latest year, so this is not a list of invented or one-off spellings.
Open any name to see its pairing page — coordinated twin names, each scored for how well it fits. Use the sort control above to switch between A–Z and 2025 popularity. To browse a different letter, go back to all twin names.