They are all major Olympians.
Demeter never got married but she did get a baby with Zeus.
Athena was born from the head of Zeus with armor and weapons made by Metis.
Athena's story is that she was born in Zeus's head, that is also how she got her knowledge in the Greek myths.
Athena Zeus and Metis got pregnant with Athena. When Zeus heard a prophecy that said any offspring of Metis and Zeus would be better then him he ate Metis. Metis gave birth to Athena in Zeus. Zeus complained of headaches, because Metis was doing spells in him, so he had a Hephaestus cut his head open. And out poped Athena from his forehead with weapons her mother gave her. Athena had thunderbolt and Aegis which she shared with Zeus.
since Zeus is the most powerful and he is her father, then she probably got it from him
They got their names from their Greek parents, Zeus and Athena.
Yes, in Greek mythology, Demeter was married to her brother Zeus and had a daughter named Persephone.
Athena was born in 1913 and Athena popped out of Zeus'Brain. Athena was not born but was popped in Zeus'Brain at the Parthenon. Athena's mother and father is Zeus and Metis. Hera became Zeus's wife. Hera was jealous of Zeus. Athena did not see her real mother but fake mother. I feel like crying because Athena got parted from her real mother and she is with her fake and jealous mother that is a goddess.
Athena, Artemis, Aphrodite, Hebe, Helen, the Muses, Persephone are daughters of Zeus.
Zeus is the husband of Demeter and Hera.Demeter got 'married' to ALOT of people, but she never stayed married to one person.
When Zeus swallowed Athena's mother Metis, Zeus started to have blinding head pains so he got Hephaestus to crack his head open with an axe and out sprung Athena in full battle armor
if by "got adpoted to" you mean did Zues adopt Athena, then really no. she was born from his head and that is why she is the goddess of wisdom and knowledge.