This Family Tree is a "tree" showing families that are related to the Olympian gods and the Olympian demigods after World War I or the First Titanomachy. The start of the family began with the earth goddess, Gaea, Ouranos or Uranus, and/or Tartarus.
Immortals
Immortals | Father | Mother | Title
Ouranos | None | Gaea | Primordial god of the Sky and Heavens
Gaea | Chaos | N/A | Primordial Goddess of the Earth
Oceanus | Ouranos | Gaea | Titan God of the Ocean
Coeus | Ouranos | Gaea | Titan God of the North and Intellect
Krios | Ouranos | Gaea | Titan God of the South and Stars
Hyperion | Ouranos | Gaea | Titan God of the East and Light
Iapetus | Ouranos | Gaea | Titan God of the West and Mortality
Themis | Ouranos | Gaea | Titan Goddess of Law and Custom
Rhea | Ouranos | Gaea | Titan Goddess of Family and Nature
Theia | Ouranos | Gaea | Titan Goddess of Sight and Enlightenment
Mnemosyne |Ouranos | Gaea | Titan Goddess of Memory and the Mind
Phoebe |Ouranos | Gaea | Titan Goddess of Darkness and Mysteries
Tethys |Ouranos |Gaea | Titan Goddess of the Sea and Lakes
Cottus |Ouranos |Gaea | Hundred Handed One, Hekatonkheire
Briares |Ouranos | Gaea | Hundred Handed One, Hekatonkheire
Gyges |Ouranos |Gaea | Hundred Handed One, Hekatonkheire
Kronos |Ouranos |Gaea | King of the Titans, Titan of Time and Titan-God of Farming
Hestia | Kronos | Rhea | Goddess of Home and Hearth
Hades | Kronos | Rhea | Lord of the Underworld and god of the Dead
Demete | Kronos | Rhea | Olympian Goddess of Agriculture, Harvest, and Forest
Poseidon | Kronos | Rhea | Olympian God of the Sea and earthquakes
Hera | Kronos | Rhea | Queen of the Olympians, Olympian Goddess of Marriage
Zeus | Kronos | Rhea | King of the Olympians, Olympian God of the Sky
Athena | Zeus | Metis | Olympian Goddess of Wisdom, Handicrafts and Battle Strategy
Apollo | Zeus | Leto | Olympian God of Music, Poetry, Medicine, Oracles and the Sun
Artemis | Zeus | Leto | Olympian Goddess of the Hunt and the Moon
Hermes | Zeus | Maia | Olympian God of Messengers, Thieves, Merchants and the Roads
Dionysus | Zeus | Semele | Olympian God of Wine and Partying
Ares | Zeus | Hera | Olympian God of War
Hephaestus | Zeus | Hera | Olympian God of Blacksmiths and Fire
Aphrodite | Ouranos | None | Olympian Goddess of Beauty and Love
Metis | Oceanus | Tethys | Titan Goddess of Thought
Atlas | Iapetus | Clymene | Titan God of Burdens
Prometheus | Iapetus | Clymene | Titan God of Forethought
Epimetheus | Iapetus | Clymene | Titan God of Afterthought
Chiron | Kronos | Philyra | Immortal Centaur, Trainer of Heroes
Persephone | Zeus | Demeter | Goddess of Springtime
Hebe | Zeus | Hera | Goddess of Youth
Eileithyia | Zeus | Hera | Goddess of Childbirth
Nemesis | Oceanus | Nyx | Minor Olympian Goddess of Revenge and Balance
Eris | Zeus | Hera | Goddess of Chaos, Discord, and Strife
Hypnos | Erebus | Nyx | Minor Olympian God of Sleep
Hecate | Perses | Asteria | Minor Olympian Goddess of Magic, Witchcraft and Sorcery.
Morpheus | Hypnos | Pasithea | Minor Olympian God of Dreams
Iris | Thaumas | Electra | Minor Olympian Goddess of Rainbows
Pan | Hermes | Dryope | God of the Wild
Enyo | Zeus | Hera | Goddess of War
Demigods
Demigod | Father | Mother | Cabin/Cohort
Percy Jackson | Poseidon |Sally Jackson |3/Fifth Cohort
Annabeth Chase | Frederick Chase | Athena | 6
Luke Castellan | Hermes | May Castellan | 11
Thalia Grace | Zeus | Ms. Grace | 1
Nico di Angelo | Hades |Maria di Angelo | 13
Ethan Nakamura | Unknown | Nemesis | N/A
Chris Rodriguez | Hermes | Ms. Rodriguez |11
Clarisse La Rue | Ares | Ms. La Rue | 5
Travis Stoll | Hermes | Ms. Stoll | 11
Connor Stoll | Hermes | Ms. Stoll | 11
Silena Beauregard | Mr. Beauregard | Aphrodite | 10
Jake Mason | Hephaestus | Unknown | 9
Lee Fletcher | Apollo | Unknown | 7
Michael Yew | Apollo | Unknown | 7
Will Solace | Apollo | Unknown | 7
Katie Gardner | Unknown | Demeter | 4
Miranda Gardiner | Unknown | Demeter | 4
Mark | Ares | Unknown | 5
Sherman | Ares | Unknown | 5
Piper McLean | Tristan McLean | Aphrodite | 10
Jason Grace | Jupiter | Ms. Grace | 1/Fifth Cohort
Leo Valdez | Hephaestus |Esperanza Valdez | 9
Kayla | Apollo | Unknown | 7
Austin | Apollo | Unknown | 7
Drew | Unknown | Aphrodite | 10
Lacy | Unknown | Aphrodite | 10
Mitchell | Unknown | Aphrodite | 10
Nyssa | Hephaestus | Unknown | 9
Harley | Hephaestus | Unknown | 9
Hazel Levesque | Pluto | Marie Levesque |Fifth Cohort
Frank Zhang | Mars |Emily Zhang | Fifth Cohort
Reyna | Unknown | Bellona | Unknown
Dakota | Bacchus | Unknown | Fifth Cohort
Hylla | Unknown | Bellona |N/A
Immortals
Immortals | Father | Mother | Title
Ouranos | None | Gaea | Primordial god of the Sky and Heavens
Gaea | Chaos | N/A | Primordial Goddess of the Earth
Oceanus | Ouranos | Gaea | Titan God of the Ocean
Coeus | Ouranos | Gaea | Titan God of the North and Intellect
Krios | Ouranos | Gaea | Titan God of the South and Stars
Hyperion | Ouranos | Gaea | Titan God of the East and Light
Iapetus | Ouranos | Gaea | Titan God of the West and Mortality
Themis | Ouranos | Gaea | Titan Goddess of Law and Custom
Rhea | Ouranos | Gaea | Titan Goddess of Family and Nature
Theia | Ouranos | Gaea | Titan Goddess of Sight and Enlightenment
Mnemosyne |Ouranos | Gaea | Titan Goddess of Memory and the Mind
Phoebe |Ouranos | Gaea | Titan Goddess of Darkness and Mysteries
Tethys |Ouranos |Gaea | Titan Goddess of the Sea and Lakes
Cottus |Ouranos |Gaea | Hundred Handed One, Hekatonkheire
Briares |Ouranos | Gaea | Hundred Handed One, Hekatonkheire
Gyges |Ouranos |Gaea | Hundred Handed One, Hekatonkheire
Kronos |Ouranos |Gaea | King of the Titans, Titan of Time and Titan-God of Farming
Hestia | Kronos | Rhea | Goddess of Home and Hearth
Hades | Kronos | Rhea | Lord of the Underworld and god of the Dead
Demete | Kronos | Rhea | Olympian Goddess of Agriculture, Harvest, and Forest
Poseidon | Kronos | Rhea | Olympian God of the Sea and earthquakes
Hera | Kronos | Rhea | Queen of the Olympians, Olympian Goddess of Marriage
Zeus | Kronos | Rhea | King of the Olympians, Olympian God of the Sky
Athena | Zeus | Metis | Olympian Goddess of Wisdom, Handicrafts and Battle Strategy
Apollo | Zeus | Leto | Olympian God of Music, Poetry, Medicine, Oracles and the Sun
Artemis | Zeus | Leto | Olympian Goddess of the Hunt and the Moon
Hermes | Zeus | Maia | Olympian God of Messengers, Thieves, Merchants and the Roads
Dionysus | Zeus | Semele | Olympian God of Wine and Partying
Ares | Zeus | Hera | Olympian God of War
Hephaestus | Zeus | Hera | Olympian God of Blacksmiths and Fire
Aphrodite | Ouranos | None | Olympian Goddess of Beauty and Love
Metis | Oceanus | Tethys | Titan Goddess of Thought
Atlas | Iapetus | Clymene | Titan God of Burdens
Prometheus | Iapetus | Clymene | Titan God of Forethought
Epimetheus | Iapetus | Clymene | Titan God of Afterthought
Chiron | Kronos | Philyra | Immortal Centaur, Trainer of Heroes
Persephone | Zeus | Demeter | Goddess of Springtime
Hebe | Zeus | Hera | Goddess of Youth
Eileithyia | Zeus | Hera | Goddess of Childbirth
Nemesis | Oceanus | Nyx | Minor Olympian Goddess of Revenge and Balance
Eris | Zeus | Hera | Goddess of Chaos, Discord, and Strife
Hypnos | Erebus | Nyx | Minor Olympian God of Sleep
Hecate | Perses | Asteria | Minor Olympian Goddess of Magic, Witchcraft and Sorcery.
Morpheus | Hypnos | Pasithea | Minor Olympian God of Dreams
Iris | Thaumas | Electra | Minor Olympian Goddess of Rainbows
Pan | Hermes | Dryope | God of the Wild
Enyo | Zeus | Hera | Goddess of War
Demigods
Demigod | Father | Mother | Cabin/Cohort
Percy Jackson | Poseidon |Sally Jackson |3/Fifth Cohort
Annabeth Chase | Frederick Chase | Athena | 6
Luke Castellan | Hermes | May Castellan | 11
Thalia Grace | Zeus | Ms. Grace | 1
Nico di Angelo | Hades |Maria di Angelo | 13
Ethan Nakamura | Unknown | Nemesis | N/A
Chris Rodriguez | Hermes | Ms. Rodriguez |11
Clarisse La Rue | Ares | Ms. La Rue | 5
Travis Stoll | Hermes | Ms. Stoll | 11
Connor Stoll | Hermes | Ms. Stoll | 11
Silena Beauregard | Mr. Beauregard | Aphrodite | 10
Jake Mason | Hephaestus | Unknown | 9
Lee Fletcher | Apollo | Unknown | 7
Michael Yew | Apollo | Unknown | 7
Will Solace | Apollo | Unknown | 7
Katie Gardner | Unknown | Demeter | 4
Miranda Gardiner | Unknown | Demeter | 4
Mark | Ares | Unknown | 5
Sherman | Ares | Unknown | 5
Piper McLean | Tristan McLean | Aphrodite | 10
Jason Grace | Jupiter | Ms. Grace | 1/Fifth Cohort
Leo Valdez | Hephaestus |Esperanza Valdez | 9
Kayla | Apollo | Unknown | 7
Austin | Apollo | Unknown | 7
Drew | Unknown | Aphrodite | 10
Lacy | Unknown | Aphrodite | 10
Mitchell | Unknown | Aphrodite | 10
Nyssa | Hephaestus | Unknown | 9
Harley | Hephaestus | Unknown | 9
Hazel Levesque | Pluto | Marie Levesque |Fifth Cohort
Frank Zhang | Mars |Emily Zhang | Fifth Cohort
Reyna | Unknown | Bellona | Unknown
Dakota | Bacchus | Unknown | Fifth Cohort
Hylla | Unknown | Bellona |N/A