| Name | Meaning | Gender | Origin |
|---|
| Max | Little Maximus | Male | Latin |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Maxie | Pet form of names starting with Max | Unisex | English |
| Maximus | The greatest | Male | Latin |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Moses | Drawn out of the water | Male | Hebrew |
| Nero | Stern | Male | Latin |
| Ninja | | Unisex | Hebrew |
| Oscar | Divine spear | Male | English |
| Otto | Wealth | Male | German |
| Pax | Peace | Unisex | Latin |
| Prinz | | Unisex | Hebrew |
| Rambo | | Unisex | Hebrew |
| Ramses | Son of Ra | Male | Ancient Egyptian |
| Rocky | Battle cry | Male | Germanic |
| Rogue | | Unisex | Hebrew |
| Roman | Roman | Unisex | Latin |
| Roxie | Star | Unisex | Persian |
| Rufus | Red | Male | Latin |
| Sable | Sable (black) | Unisex | English |
| Sabre | | Unisex | Hebrew |
| Samson | Sun | Male | Hebrew |
| Sandy | Defending men | Male | Greek |
| Sasha | Defending men | Unisex | Greek |
| Sasquatch | Has extra toes and hence is a bigfoot | Unisex | English |
| Satan | The Devil and adversary of God | Unisex | English |
| Saturn | Sixth and second largest planet away from the Sun. | Unisex | English |
| Shadow | Shadow | Unisex | English |
| Shark | | Unisex | Hebrew |