Yes, as Athena was Zeus's daughter in many myths. It may be that Athena's father is instead Poseidon or Triton, but it is unlikely that Rick Riordan knew of those versions in Greek myth.
It is largely believed that Athena was born of Zeus alone, so yes, that would make Rick Riordan's Annabelle a granddaughter of Zeus.
Annabelle
The goddess Athena is the daughter of Zeus and Metis. Since Zeus is the son of Kronos, Athena is Kronos' granddaughter.
The greek goddess Tyche was the goddess of fortune.She was also Zeus's granddaughter.
Annabelle Wallis's birth name is Annabelle Wallace.
Annabelle Moore's birth name is Annabelle Whitford.
Annabelle is real
Annabelle is not real
Annabelle Wallis was born Annabelle Wallace on September 25, 1984.
Annabelle from The Conjuring is a regular rage doll
Annabelle Bourlet is 5' 6".
Annabelle is not real