| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 941 | Oliveria | Spanish | Affectionate. | F | |
| 942 | Oliverio | Spanish | Affectionate. | M | |
| 943 | Oliverios | Spanish | Affectionate. | M | |
| 944 | Olivia | Spanish | Olive. | F | |
| 945 | Ora | Spanish | Gold. | F | |
| 946 | Orlan | Spanish | Renowned in the land. Form of Roland. | M | |
| 947 | Orland | Spanish | Renowned in the land. Form of Roland. | M | |
| 948 | Orlando | Spanish | Famous land. | M | |
| 949 | Orlin | Spanish | Renowned in the land. Form of Roland. | M | |
| 950 | Orlondo | Spanish | Renowned in the land. Form of Roland. | M | |
| 951 | Oro | Spanish | Gold. | M | |
| 952 | Orquidea | Spanish | Orchid. | F | |
| 953 | Orquidia | Spanish | Orchid. | F | |
| 954 | Osana | Spanish | Health. | F | |
| 955 | Osane | Spanish | Health. | F | |
| 956 | Pabla | Spanish | Little. | F | |
| 957 | Pablo | Spanish | Variant of Paul: Small. Famous Bearer: artist Pablo Picasso (1881-1973). | M | |
| 958 | Pacho | Spanish | Free. | M | |
| 959 | Paciencia | Spanish | Patient. | F | |
| 960 | Paco | Spanish | Free. | M | |