There are 241 O- names for baby boys. Displayed on this page are O- names 1 to 20. Octavio was the most popular among these names in 2008 with a rank of #865 and a usage of 0.0113%. The unusual O- names are O'Brien (Irish), Oalo (Spanish), Obafemi (Yoruban), Obasi (Igbo), Oberon (English), Obi (Igbo), Obike (Igbo), Ocky (English), Octave (English), Octavian (English and German), Octavion (Spanish), Octavius (English and German), Octavus (English), Octovio (Spanish), Odd (Scandinavian), Oddo (German and Italian), Oddone (Italian), Ode (English), and Odell (English). O- names are fairly popular baby names for boys, and they are also considered trendy. At the height of their usage in 1901, 1.142% of baby boys were given O- names. There were 25 O- names ranked within the top 1000 baby names then. O- names have since experienced a decline in frequency. In 2008, 11 O- names listed among the top 1000, with a combined usage of 0.945%, having regained their popularity somewhat in the recent decade. Within all O- names, the English, Irish, and Welsh Owen was the most commonly used, with a ranking of #58 and a usage of 0.3589%.
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| O'Brien | exalted and high-minded ... used predominantly in Irish and it is ... listed outside of the top 1000 ... |
| Oalo | little, humble ... primarily used in Spanish and its ... variation of Paul ... not in the top 1000 names ... |
| Obafemi | the king loves me ... used chiefly in the Yoruban language ... unusual as a baby boy name ... |
| Obasi | in honor of the Supreme ... language of origin is African-Igbo and it is ... an unusual baby name for boys ... |
| Oberon | noble bear; elf ruler, ... origin is Germanic, and its use, English ... variant of Auberon ... |
| Obi | Heart ... used chiefly in the Igbo language and its ... a baby boy name of irregular use ... |
| Obike | a concerned family ... language of origin is African-Igbo and it is ... unusual as a baby boy name ... |
| Ocky | god spear; gentle friend ... an English name of Old Norse origin ... form of Oscar ... |
| Octave | eighth ... language of origin is Latin and it is ... form of Octavius ... not in the top 1000 names ... |
| Octavian | eighth ... origin is Latin, and its use, English and ... variant form of Octavius ... |
Octavio  865 | eighth ... has its origins in the Latin language, ... variant of Octavius ... Its ranking then was #531 ... |
| Octavion | eighth ... used mostly in Spanish and it is of ... variation of Octavius ... not in the top 1000 names ... |
Octavius  | eighth ... used predominantly in the English and ... first name is derived from the Roman family ... |
| Octavus | eighth ... largely used in English and its origin ... variant of Octavius ... |
| Octovio | eighth ... has its origins in the Latin language and ... variant of Octavius ... |
| Odd | point of a spear ... mainly used in the Scandinavian language ... unusual as a baby boy name ... |
| Oddo | wealth, fortune; owner, ... mainly used in German and Italian ... Its language of origin is Germanic ... |
| Oddone | owner, proprietor ... language of origin is Germanic and it is ... name is derived from the Longobard Odan ... |
| Ode | woad hill ... used predominantly in the English language ... variant of Odell ... |
Odell  | woad hill ... used chiefly in the English language and ... first name is derived from the English ... |
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