Greek/Roman gods are listed below. The Romans essentially adapted the Greek gods to their own culture.
Not all the gods had equivalents. Where no equivalent exists, the God appears in the list as "..." rather than a name.
Greek Name / Roman Name : Description
Zeus / Jupiter : Lord of the Sky, Gods, and Thunder, Rain-god, Cloud-gatherer
Hera / Juno : Protector of Marriage
Poseidon / Neptune : Ruler of the Sea
Hades, Polydectes / Pluto : God of the Underworld and Precious Metals
... / Libitina : Goddess of the Underworld
Pallas Athena / Minerva : Goddess of the City, Education/Science, and War
Phoebus Apollo / Apollo : God of Sun, Truth, Music, Healing
Artemis, Orthia, Phoebe / Diana : Goddess of Wild Things, Hunter-in-Chief
Aphrodite, Anadyomene / Venus : Goddess of Love and Beauty
Hermes, Pyschopompus / Mercury : God of Commerce and Market, Zeus' Messenger
Ares / Mars : God of War
Enyo / Bellona : Lesser Goddess of War
Hephaestus / Vulcan, Mulciber : God of the Forge and Fire, Workman to the immortals
Hestia / Vesta :Goddess of the Hearth and Home; also Fertility(Greek only)
... / Priapus : God of Fertility
Eros / Cupid, Amor : God of Love
Hymen / ... : God of the Wedding Feast
Hebe / ... : Goddess of Youth
... / Juventus : God of Youth
Iris / ... : Goddess of the Rainbow
Persephone, Kora / Persipina, Libera : Goddess of Spring [Season], Underworld through Hades
Demeter / Ceres : Goddess of the Corn, Earth, Harvest
Dionysus, Lycaeus / Bacchus, Liber : God of the Vine, Wine, Merriment
Pan / Inuus,Faunus : God of Flocks, Sheep
Selene / Luna : Goddess of the Moon
Helios / Sol : God of the Sun
... / Terminus : Guardian of Boundaries
... / Priapus : Cause of Fertility
... / Pales : Strengthener of Cattle
... / Sylvanus : Helper of Plowmen and Woodcutters
... / Saturn : Protector of the Sowers and the Seed
... / Janus : God of good beginnings
Eileithyia, Ilithyia / Lucina : Goddess of Childbirth
... / Pomona & Vertumnus : Powers Protecting Orchards and Gardens
Aether / ... : God of Light
Eos / Aurora, Mater Matuta : Goddess of the Dawn
Asklepios / Aesculapius : God of Health and Medicine
Hygea / ... : Goddess of Health
Aeolus / ... : King of the Winds
Boreas / Aquilo : North Wind
Zephyr / Favonius : West Wind
Notus / Auster : South Wind
Eurus / Eurus : East Wind
Pontus / ... : God of the Deep Sea
Nereus / ... : "Old Man of the Sea"
Triton / ... : Trumpeter of the Sea
Ate / ... : Goddess of Mischief
Eris / Discordia : Goddess of Discord
Maia / Fauna, Bono Dea : Goddess of Fields, "Good Goddess"
... / Flora : Goddess of Flowers
Hypnos / Somnus : God of Sleep
... / Juturna : Goddess of Springs [Water]
Nike / Victoria : Goddess of Victory
Peitha / Suadela : Goddess of Persuasion
Hecate / Trivia : Goddess of the Crossways, the Dark Side of the Moon, and Magic
Tyche / Fortuna : Goddess of Fortune
... / Voluptas : Goddess of Pleasure
Poena / ... : Goddess of Punishment
Nemesis / ... : Goddess of Revenge
Hespera / ... : Goddess of Dusk
Morpheus / ... : God of Dreams
Phosphor / Lucifer : Light-bearer, Star that brings in the day
Fama / ... : God of fame, rumor