| Name | Meaning | Gender | Origin |
|---|
| Moses | saved; child; taken from water | Male | Egyptian |
| Mullet | | Unisex | Hebrew |
| Muppet | | Unisex | Hebrew |
| Mushu | | Unisex | |
| Nacho | Small triangles of tortilla topped with cheese. | Male | Word |
| Noir | | Unisex | |
| Odin | Viking mythology: the allmighty god | Male | Old |
| 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 |
| Omar | first son, disciple; gifted speaker; famous | Male | Arabic |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |
| Oscar | God's spear.
| Male | English |
| Otis | Wealthy.
| Male | |
| Patches | | Male | |
| Pea | | Unisex | Hebrew |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | |
| Pebbles | after the character in 'The Flintstones' cartoons | Male | |
| Pepper | A spice or condiment. | Male | Sanskrit |
| Petoskey | | Unisex | Hebrew |
| Pillow | A cloth case stuffed with something soft to cushion the head during sleep. | Unisex | |
| Pocket | | Unisex | |
| Pouncer | catname in Struwwelpeter | Unisex | |
| Pumpkin | Large round fruit with orange skin | Male | |
| Ramses | son of God | Male | Egyptian |
| Rapunzel | | Unisex | |