| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 3121 | Ossie | English | Diminutive of Oscar: Divine spear; God's spear. Famous Bearer: poet Oscar Wilde (1854-1900), who was put on trial and imprisoned for homosexuality. | M | |
| 3122 | Ossy | English | Diminutive of Oscar: Divine spear; God's spear. Famous Bearer: poet Oscar Wilde (1854-1900), who was put on trial and imprisoned for homosexuality. | M | |
| 3123 | Oswald | English | Divine power. | M | |
| 3124 | Osweald | English | Divinely powerful. | M | |
| 3125 | Oswell | English | Divinely powerful. | M | |
| 3126 | Oswin | English | Divine friend; God's friend. | M | |
| 3127 | Owain | English | Variant of Ewen: Variant of Eoghan or Eugene. | M | |
| 3128 | Owen | English | Variant of Ewen: Variant of Eoghan or Eugene. | M | |
| 3129 | Oxford | English | From the ox ford. | M | |
| 3130 | Oxley | English | From the ox enclosure. | M | |
| 3131 | Oxnaford | English | From the ox ford. | M | |
| 3132 | Oxnaleah | English | From the ox enclosure. | M | |
| 3133 | Oxnatun | English | From the ox farm. | M | |
| 3134 | Oxton | English | From the ox farm. | M | |
| 3135 | Oz | English | Divine. | M | |
| 3136 | Ozzie | English | Diminutive of Oswald: Divine power. | M | |
| 3137 | Ozzy | English | Diminutive of Oswald: Divine power. | M | |
| 3138 | Paegastun | English | From the fighter's farm. | M | |
| 3139 | Paella | English | Mantle. | M | |
| 3140 | Paine | English | Pagan. | M | |