Penelope is the faithful wife of Odysseus, who kept her suitors at bay in his long absence and is eventually reunited with him. She was mentioned in The Blood of Olympus when Jason, Piper, and Annabeth go to Ithaca.
Trivia
Penelope was a legacy of Zeus. Her father Icarius was a son of Gorgophone, a daughter of Perseus. Her son Telemachus was descended from Zeus on his mothers side and Hermes on his fathers side.