The Demigod Tree

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Did you survive the first part? Well, you probably won't last this part because now we are looking at all of the demigods to figure out who is related to whom and how they are related to each other!

Percy Jackson is the son of Poseidon. 

Because Poseidon is the brother of Zeus, Hera, Hestia, Hades, and Demeter, Percy is also the nephew of the mentioned gods/goddesses.

He is also the cousin of any child of Zeus, Demeter, Hera, or Hades. That means he is the cousin of Heracles, Thalia, Nico, Bianca, Hermes, Aphrodite, Persephone, Artemis, Apollo, Athena, Ares, Hebe, Hephaestus, Dionysus, etc. And then thanks to this complicated guide of relationships it says "If a pair of brothers marries a pair of sisters, their kids are not only first cousins, they're double first cousins: They have both sets of grandparents in common." 

Hmmm anyone know a brother and a sister who married each other? Oh yeah, that's right. 

To sum it up, it basically means that any child of Zeus and Hera is not only first cousins but they are also double first cousins to Percy. On top of that, Persephone and Percy are also double first cousins because she was the daughter of Zeus and Demeter who are also siblings.

Isn't it funny how it's basically Zeus that makes all of the relationships complicated?

The guide also says "Your parent's first cousin is your first cousin once removed. The child of your first cousin is also your first cousin once removed: your grandparent is that child's great-grandparent."

So that means that Percy is the first cousin once removed to any child of Heracles, Thalia, Nico, Bianca, Hermes, Aphrodite, Persephone, Artemis, Apollo, Athena (PHEW. That means Percabeth is actually legal...I think), Ares, Hebe, Hephaestus, Dionysus, etc. 

He is also the grandson of Kronos and Rhea, the great-grandson of Ouranos and Gaia. 

So from my understanding, 

Percy and Annabeth are first cousins once removed.

Percy, Nico, Bianca, and Thalia are all cousins.

Percy and Leo are double first cousins.

Percy and Clarisse are first cousins once removed.

Percy and Tyson are half-brothers.

Percy and Katie are double first cousins since Demeter and Zeus were both siblings to Poseidon which means any child of Demeter is a double first cousin to Percy.

Basically, any child of Zeus and any grandchild of Zeus is a cousin to Percy in some sort of way.

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Annabeth is a daughter of Athena. 

Because Athena is half-sister to Ares, Hebe, Hephaestus, Dionysus, Artemis, Apollo, Hermes, Aphrodite, etc. Annabeth is the niece to the mentioned gods/goddesses. 

Hestia, Hades, Poseidon, and Demeter are also Annabeth's grandaunts/granduncles. 

Annabeth and Luke are cousins.

Annabeth and Nico are first cousins once removed.

Annabeth and Percy are also first cousins once removed.

Annabeth and Leo are cousins.

Annabeth and Clarisse are cousins.

Annabeth and Silena are cousins.

Annabeth would also be the niece of the Hunters since they are all sisters to Artemis which means

Annabeth is the niece of Thalia, Bianca, Artemis, Zoe, and any other huntress.

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Thalia is the daughter of Zeus and the Lieutenant of the Hunt.

Thalia and Artemis are sisters due to the oath.

Thalia is also the half-sister to any child of Zeus; Athena, Ares, Artemis, Apollo, Hebe, Hephaestus, Dionysus, Hermes, Aphrodite, Persephone etc.

Thalia, Percy, Bianca, and Nico are cousins.

Thalia is the aunt to any child of Athena, Ares, Artemis, Apollo, Hebe, Hephaestus, Dionysus, Hermes, Aphrodite, etc.

Thalia and Annabeth are aunt/niece.

Thalia and Luke are aunt/nephew.

Thalia and Silena are aunt/niece.

Thalia and Clarisse are aunt/niece.

Basically Thalia is almost everyone's aunt.

Because she is also Artemis's sister, she is also the sister to any member of the hunt by blood. Regardless of the oath, Artemis and Thalia were still sisters, therefore, any hunter that was sworn into the Hunt is also Thalia's sister regardless if Thalia herself took the oath.

Thalia and Bianca are sisters as well as cousins.

Thalia and Zoe are sisters.

Thalia and Phoebe are sisters as well as aunt/niece.

Thalia and Jason are also siblings, but we are not going to be delving into the relations of the Roman and Greek demigods because that will make everything even more complicated than they already are.

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Nico is the son of Hades.

Nico, Thalia, and Percy are cousins.

Nico and Thalia are also half-siblings after Bianca becomes a hunter.

Nico and Annabeth  are first cousins once removed.

Nico and Clarisse are first cousins once removed.

Nico and Silena are first cousins once removed.

Nico is the nephew of Hera, Poseidon, Demeter, Hestia, and Zeus.

Nico is the cousin to Persephone, Artemis, Apollo, Hermes, Aphrodite, Dionysus, Hephaestus, Hebe, Ares, and Athena. 

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If I did every single character it would take me years, but here's a basic summary:

Any child of Zeus is the aunt/uncle of any child of Athena, Ares, Hebe, Hephaestus, Dionysus, Hermes, and Aphrodite.

Any child of Hestia, Hades, Poseidon, Zeus, Hera, or Demeter are cousins to any child of the mentioned gods except for their godly parent, of course.

Any hunter of Artemis is sister to Apollo, Hermes, Aphrodite, Dionysus, Hephaestus, Hebe, Ares, Athena, and Persephone.

Any hunter of Artemis is also the niece of Hestia, Hades, Poseidon, and Demeter.

Any children of Athena, Ares, Hebe, Hephaestus, Dionysus, Hermes, Artemis, Apollo, or Aphrodite are cousins to each other, except the children of their godly parent.

Any child to Poseidon and Hades are also double first cousins to any child of Ares, Hebe, Hephaestus, and Persephone.


If I got any of this stuff wrong, I apologize, but that just shows you how complicated these relationships are. It's very confusing especially since there aren't really any sites that tell me how a son and mother's child are related to a brother and sister's child... which is good I guess? But makes it really complicated when trying to figure out how everyone is related :P






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