O- names for baby boys, with 1563 entries. O- names are popular baby names for boys, and they are also considered trendy. The names have been increasing in popularity since the 1960s. At the recent height of their usage in 2016, 1.541% of baby boys were given O- names. There were 10 O- names ranked within the top 1000 baby names then. In 2017, 10 O- names listed among the top 1000, with a combined usage of 1.524%. Within all O- names, the English and German Oliver was the most commonly used, with a ranking of #9 and a usage of 0.6693%.
| O'Brien | exalted and high-minded ... used predominantly in Irish and it is derived ... listed outside of the top 1000 ... |
| O'Keefe | descendent of Caomh, descendent ...is of Irish Gaelic origin ... variant transcription of Keefe ... |
| O'Ryan | limit, boundary; urine ...O'Ryan's origin is Old Greek ... derivative of Orion ... |
| O'Shane | son of Shea ...is of Irish origin ... derivative of O'Shea ... infrequently used as a baby name for ... |
| O'Shea | son of Shea ...O'Shea's origin is Irish ... O'Shea is rarely used as a baby name for boys ... |
| O'shay | O'shay is of various origins ... variation of O'shea ... an infrequently used baby name for ... |
| O'shea | O'shea's origin is varied ... infrequently used as a baby name for ... not listed in the top 1000 names ... |
| O.J. | origin is English-American ... form of OJ ... ... is not frequently used as a baby boy name ... |
| Oachs | oak trees ... origin is English ... variant form of Oakes ... a rare baby boy name ... |
| Oak | oak trees ...The origin of Oak is English ... variant transcription of Oakes ... rare as a baby boy name ... |
| Oakdan | dweller in the oak valley ... origin is Old English ... form of Ogden ... unusual as a baby boy name ... |
| Oakden | dweller in the oak valley ... of Old English origin ... variant transcription of Ogden ... |
| Oakdin | dweller in the oak valley ... of Old English origin ... derivative of Ogden ... not in the top 1000 names ... |
| Oakdon | dweller in the oak valley ... has its origins in the Old English ... derivative of Ogden ... |
| Oakdun | dweller in the oak valley ...The origin of Oakdun is the Old English language ... form of Ogden ... |
| Oakdyn | dweller in the oak valley ...The origin of Oakdyn is the Old English language ... variation of Ogden ... |
| Oake | oak trees ...The origin of Oake is English ... variant transcription of Oakes ... |
| Oakea | oak trees ... origin is English ... form of Oakes ... rarely used as a baby name for boys ... |
| Oakee | oak trees ... origin is English ... form of Oakes ... rarely used as a baby name for boys ... |
| Oakes | oak trees ... has its origins in the English language ... rarely used as a baby name for boys ... |
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