Disclaimer: Many names have multiple origins, and multiple meanings. This list only contains the water-related meanings!
Having said that, although this list was made with thorough research, I relied on the internet for this research, and I'm aware that not everything online is reliable. If you spot something you think is an error, please do let me know in the comments so I can put an amendment.
You'll also find more ideas in the comments of this post!
Masculine
| Name | Origin | Meaning |
| Ægir | Norse | Sea/ocean giant |
| Indra | Sanskrit | Deity associated w/ storms |
| Marinus | Latin | Of the sea |
| Alford | Old Eng. | Old river ford |
| Gyatso | Tibetan | Ocean |
| Proteus | Greek | Early deity of sea / rivers |
| Nereus | Greek | Another early sea deity |
Feminine
| Name | Origin | Meaning |
| Anahita | Persian | Name of water goddess |
| Vaihere | Tahitian | Water + beloved |
| Itsaso | Basque | Sea |
| Mar | Spanish | Sea |
| Cordelia | Celtic | Daughter of the sea |
| Varsha | Sanskrit | Rain |
| Iara | Tupi | Lady of the water |
| Aysu | Turkish | Moon + water |
Unisex / Neutral
| Name | Origin | Meaning |
| Deniz | Turkish | Sea |
| Morgan | Welsh | Sea-born / Of the sea |
| Baran | Persian | Rain |
| River | English | River |
| Kai | Hawaiian | Sea |
| Beck | Old Eng. | Brook / stream |
| Gale | English | Storm |
| Rayne | English | Alt. spelling of 'rain' |
