POSEIDON EPITHETS / SURNAMES
Poseidon Gaienokhos - Holder of the earth.
Poseidon Ennosigaios (Ἐννοσίγαιος) - Earth Shaker
Poseidon Soter - “Savior”; Savior of Sailors, for when people wanted to be protected at sea.
Poseidon Aspha’lius/Asphaleius - “Of safety” ; He who grants safety to ports and navigation
Poseidon Prosbaterios - “Of Approaches” ; For safe approaches at harbor
Poseidon Prosklystios - “The Flooder”
Poseidon Gene’sius - The Father
Poseidon Pontomedon - Lord of the Sea
Poseidon Anax - King, Lord, Master
Poseidon Basileus - “The Lord, King” ; Aboard ships or in his cities
Zeus Einalios - Zeus of the Seas
Poseidon Aglaotriaina - He of the bright trident
Poseidon Eutriaina - Of godly trident
Poseidon Asphaleios (ασφάλεια) - “Of safety/security”; Protector/Averter of the earthquakes, for those on dry land.
Poseidon Hedraios - “with a Firm Base” ; Protection from earthquakes
Poseidon Themelioukhos - “Holder of Foundations”
Poseidon Hippios (ἲππειος) - “Of the horses” ; Creator and tamer of horses, for those having trouble taming horses, or if your horses were sick or in danger. Also for protection of horses during storms, warfare, droughts, etc, as well as perform in competitions or when the distance to travel is long.
Poseidon Hippokourios - “Horse-tender”
Poseidon Nymphayaetis - Leader of the nymphs, for those asking for help to influence the behavior of nymphs.
Poseidon Tau’reus - The divinity that gave great pasture to bulls on the sea-cost, and/or it is to him that the bulls were sacrificed.
Poseidon Epoptes - “Watcher, Overseer” ; For he saw everything that happened at sea
Kyanochetis (κυανοχαίτης) - “Dark (or Blue) -Haired”, like the sea
Phykios (φύκιος) - “full of seaweed"
Poseidon Epilimnios - He of all lakes
Poseidon Kymothalis - Abounding with waves
Poseidon Prosklystios - “Who Dashes Against”
Poseidon Phytalmius - “Nurturer of Plants” ; likely due to the fact that Poseidon’s trident created the springs that provided water to vegetation.
Poseidon Khamaizelos - “Seeking the Ground”
Poseidon Baructupos - Loud thundering, Heavy sounding (also of Zeus)
Poseidon Tropaios - “Of Route” ; (Poseidon receives that title, normal in the cult of Zeus, by Sarpedon’s troops to perhaps celebrate the paradoxical routing of an army on land by the god of the sea)
Poseidon Pater - “Father”
Poseidon Patroios - “Of the Forefathers”
Poseidon Laoites - “Of the People”
Epithets/Names of Poseidon Based on Location:
Poseidon Pelagios (Πελάγιος) - "belonging to the sea" in Ionia
Poseidon Petraeus - He who separated the rocks, between which the river Peneius flows into the sea. Among the Thessalians.
Poseidon I’sthmius - The god worshipped on the Isthmus (of Corinth), in honour of whom the Isthmian games were celebrated.
Poseidon Pelagios - “of the Sea”, at the southern tip of the peninsula of Sinai
RESOURCES (in no particular order):
Greek Gods Abroad - Names, Natures, and Transformations by Robert Parker Oakland, CA
The Gods of Ancient Greece - Identities and Transformations by Jan N Bremmer and Andrew Erskine
theoi.com * Please be careful with theoi.com, latest updates are more on the clickbait-y type; however has pretty good information for starters- just remember to fact check everything!
wikipedia.com * Wikipedia just looks bad, man.. but their page on Poseidon is pretty good- Just fact check everything !
study.com * You need to pay, which SUCKS but is pretty good from what I was able to read
polytheistramblings.wordpress.com * Be careful with blogs - always fact check!