O-, var. Odell▼, O'Shay, O'Shea, O'Keefe, means "descendant of". Less popular today. Odell was the form last recorded (the 1970s) in the Top 1000.
Oakes, var. Oak, Ochs, Oaks, means "near the oak trees". Oakes (cf. Eakes, Flakes) is a popular surname that ends with -akes.
Oakley, var. Oak, Oakes, Oakly, Oaklee, Oakleigh, means "meadow of oak trees". Oakley (+112) is a trendy version undergoing resurgence.
Obadiah, var. Obie▼, Oved, Obed, Obadya, Ovadiah, Obediah, Obadias, Ovadiach, means "servant of God". Obadiah, Obadias, Obadya, Obed and Obediah are more unconventional as versions.
Obama, means "crooked, somewhat bent". Not in Top 1000.
Oberon, var. Oberron, means "royal bear". Unique. Oberon, Oberron, like Erron, Kevron, end with the popular masculine -ron.
Obert, means "wealthy and bright". Obert, like the similar Abert, occurs more often as a surname.
Obi, means "heart". Outside Top 1000.
Octavio▼, var. Octavo, Octave, Ottavio, Octavus, Octovien, Octavius, Octavian, Octavious, means "eighth". Octavio is conventional (top 64%) as a masculine name.
Odell▼, var. Odie▼, Odall, means "woad hill". Adoption of Odie and forms intensified during 1900-1909 and has become less, with Odell and Odie becoming less fashionable.
Odilo, var. Odile, Ottild, Otildo, Odilon, Odilio, Ottildo, means "fortunate or prosperous in battle". Not in Top 1000.
Odin. A very familiar children's name (#476 in 2014), Odin is also found often as a surname. See also Owin.
Odo. Not Top 1000 name. See also Odon.
Odolf, var. Odulf, Odolff, means "prosperous wolf". Not widespread. Odolf, Odolff and Odulf are not found in the US Demographics.
Odhran, var. Oran▼, Odran, means "pale". Popular, and Odhran, Odran, Oran (31%) are similar to common -ran last names Badran (upper 47%), Ceran (89%).
Odysseus, var. Odysse, means "angry man". Not Top 1000 names.
Ofir, var. Ophir, Ofeer, means "gold". Ofir, Ofeer and Ophir were not Top birth names in 2014.
Ogden, var. Ogdon, Ogdan, means "oak valley". Ogden, Ogdan and Ogdon are not often used as children's names.
Ohad, var. Ohed, means "loved one". Unusual as boys' names, but Ohad and Ohed are comparable to the more common Otha.
Oisin, var. Ossin, Ossian. Unusual. Oisin, Ossin, like Ostin, Birgin, end with the familiar masculine -in.
Olaf▼, var. Ola, Ole▼, Olof, Olov, Olle, Olin▼, Olav, Olave, Olaff, means "ancestor's relic". Not in Top 1000.
Oleg, means "holy". Not Top 1000 name. See also Ole.
Olexei, var. Olexi, Oleksi, Olexiy, Olexey, Oleksiy, Oleksey, Oleksei, means "man's defender". Olexey and variants are not frequently used as baby names.
Olimpio, var. Olimpo, Olympus, Olympio, Olympios, means "from Mount Olympus". Outside Top 1000.
Olin▼, var. Olyn, Olen▼. Popular as last names, and Olin (upper 5%) is similar to popular -lin surnames Palin (upper 15%), Milin (57%).
Olindo, means "scented". Uncommon, but Olindo is comparable to common Oli- surnames Olin (top 5%), Oline (78%).
Oliver, var. Olley, Ollie▼, Olivor, Olivio, Olliver, Ollivor, Olivero, Olivier, Oliviero, Oliverio, means "olive tree". Prominent. Oliver, Olliver (cf. Halver, Xever) end with the favored masculine -ver.
Omar, var. Omer▼, Omarr, means "speaker; flourishing, long-lived". Popular as last names, and Omar (top 5%) is comparable to common -mar last names Romar (top 48%), Asmar (19%).
Omari, means "God the highest". Common as surname, and Omari (upper 35%) is similar to common Om- surnames Omary (upper 26%), Omar (5%). See also Omri.
Omri, means "sheaf of grain". Rare. Omri, like Deri, Nuri, ends with the popular androgynous -ri. See also Omero.