| Name | Meaning | Gender | Origin |
|---|
| Olaf | ancestor's relic | Male | Norse |
| Olga | holy | Female | Russian |
| Oliver | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. Extending an olive branch signifies an offer of peace.
| Male | Latin |
| Olivia | Olive
| Female | Latin |
| Orlando | Famous land
| Male | Italian |
| Oscar | God's spear.
| Male | English |
| Oskar | English, God's spear, Irish, deer-lover or champion warrior | Male | |
| Otto | Born eighth or wealthy
| Male | |
| Paul | small | Male | Latin |
| Paula | small | Female | Feminine |
| Petra | rock, stone | Female | Greek |
| Philip | horse lover | Male | Greek |
| Rita | pearl, precious | Female | English |
| Robert | Famed: bright: shining. 14th-century King Robert the Bruce. Robert Burns the poet.
| Male | English |
| Robin | Famed: bright: shining Form of Robert popular since the medieval days of Robin Hood. Robinson: (English) Son of Robert Famed: bright: shining. Surname.
| Male | |
| Roger | famous spearman, quiet | Male | |
| Roland | from the famous land | Male | |
| Rolf | Fame, Wolf | Unisex | German |
| Ronja | God's joyful song | Female | Scandinavian |
| Ruben | beholf of a son | Unisex | |
| Sabina | Sabine | Female | Latin |
| Saga | | Female | Hebrew |
| Sam | to hear | Male | English |
| Samuel | his name is God | Male | Hebrew |
| Sandra | Helper of Mankind | Female | English |