| Name | Meaning | Gender | Origin |
|---|
| Mollie | Bitter | Unisex | English |
| Molly | Bitter
| Female | English |
| Moon | Moon | Female | American |
| Moonbeam | | Unisex | |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | |
| Mousse | | Unisex | |
| Muddy | | Unisex | |
| New Moon | | Unisex | |
| Nutella | | Unisex | |
| Pardo | | Unisex | Hebrew |
| Penny | Greek, weaver | Female | English |
| Phantom | Something elusive. A ghost | Unisex | |
| Poppy | Flower with four crumpled petals in red, orange or white colours | Female | Latin |
| Poppy | Flower with four crumpled petals in red, orange or white colours | Female | Latin |
| Purdy | Variation on pretty. | Unisex | |
| Raven | Dark haired or wise
| Female | Word |
| Reese | ardor | Female | Welsh |
| Rolo | Burmese | Unisex | |
| Rootbeer | | Unisex | |
| Rose | Flower
| Female | Latin |
| Rosie | From Rose - The most beautiful of flowers | Female | English |
| Roxy | From Roxanne - Brilliant dawn | Female | English |
| Ruby | Jewel
| Female | Latin |
| Rusty | Covered in rust - a brownish red colour. | Unisex | |
| Ruth | compassionate friend | Female | Hebrew |