| Riva | A river or moving stream |
| Rive | To tear apart or split asunder. |
| Rob | Abbreviation of Robert Famed: bright: shining. |
| Robby | Abbreviation of Robert Famed: bright: shining. |
| Robert | Bright Fame; Famed: bright: shining. 14th-century King Robert the Bruce. Robert Burns the poet.; 'King Henry IV, Part 2' Robert Shallow, a country justice. 'King John' Robert Faulconbridge, and his father, Sir Robert Faulconbridge. 'King Richard III' Sir |
| Robinetta | A little bird of bright fame. |
| Robinette | A small bird of bright fame. |
| Roche | A name meaning a rocky mountain. |
| Rochelle | Battle Cry; To Roar; Rest; Little / Small Rock |
| Rocke | A variant of the name Rock. |
| Rodel | Famous ruler of the people |
| Rodell | A famous and powerful ruler |
| Roel | A famous and mighty ruler. |
| Roesia | A name of German origin meaning a rose. |
| Rohais | A name of Norman origin meaning horse. |
| Roi | A word meaning the king. |
| Roial | Relating to a royal status. |
| Rollan | Renowned in the land. Roland was a legendary hero who served Charlemagne. |
| Rolland | Renowned in the land. Roland was a legendary hero who served Charlemagne. |
| Romain | A name meaning from Rome. |
| Romaine | A name meaning from Rome. |
| Romana | From Rome; Romantic. Fascinating. |
| Rosamonde | A name meaning horse protector. |
| Rose | A fragrant, thorny garden flower. |
| Roselin | A beautiful roselike flower. |
| Roselyn | A beautiful rose flower. |
| Rosemaria | A bitter rose of the sea. |
| Rosemarie | A beloved rose of the sea. |
| Roslin | A name meaning land of the roses. |
| ROSLYN | A name meaning gentle rose valley. |
| Rosselin | A beautiful and noble rose. |
| Rosselyn | A gentle rose of the valley. |
| Rousse | A name meaning reddish brown. |
| Roussel | A person with reddish hair. |
| Rousset | One having a reddish complexion. |
| Rousskin | A person with a reddish skin tone. |
| Roux | A person with bright red hair. |
| Roxane | A name meaning bright star. |
| Roxanne | A name meaning bright star. |
| Roy | King; Regal; Red.; Red haired; A redhaired man / a king |