Amphitria - queen of the seas

Amphitrina - she resembles the sea goddess

Arroya - she is guided by the waters

Asraia - (az-rye-ah) the water faerie

Atlantica - daughter of the ocean

Aqualine - (aqua-leen) she belongs to the sea

Aquaria - the Sea Goddess

Aquarina - lady of the seas 

Cascadia - waterfall 

Chalis - water-bearer 

Clarity - clear seas ahead

Coral - jewel of the sea

Delta - the river queen

Glacia - the ice princess

Hydria - the water bearer 

Hyetalia - (hi-yeh-tahl-lee-yuh)  rain  ie. a blessing 

Isla - she lives upon the sea

Juturna - (yet-turn-nah) born of the fountain

Lakelyn - (lake-lyn) she is still waters

Lorelei - the temptation of the sea

Manta - a water cloak 

Marina - born on the seashore 

Melusina - the river faerie

Meris - (mare-riss)  sister of the sea

Naiadica - (nigh-add-dic-cuh)  the well faerie

Nautica - born of the sea

Nereidia - (neh-ray-dee-uh)  the ocean faerie

Nerissa - she comes from the sea

Nixa - the river mare

Ondina - the lake faerie

Piscea - (pie-see-ah)  she is born of fish ie. a mermaid

Piscine - (pie-seen) she belongs to the fish ie. a mermaid

Raine -  the blessed rains 

Riverine - she belongs to the river

Sereia - (seh-rey-ah) mermaid  

Sirena - (sai-reena) the song of the sea 

Sirenae - (sai-ren-nay) she sings to the sea

Tamesis - (tam-muh-sis) the river goddess

Thalassa - the spirit of the sea

Tritonique - she is connected to the sea

Artwork:

https://3dtotal.com/tutorials/t/digital-art-masters-volume-7-promotion-simon-eckert-painting-colour-texture-brush-character#.VToTISFVhBc

https://www.deviantart.com/yasumatsuoka/art/Moon-Mermay-Day-13-colored-825977610

https://www.zazzle.com/poster_mermaid_at_sunset-228156313275096067?rf=238629756059433023&tc=pntrst_presto

http://www.zazzle.com/secret_oceans_of_sea_jewels_mermaid_poster-228032276205037505

https://www.artstation.com/artwork/aRYbPL