Makaria. The name sounded familiar too. And she called him uncle. Who's daughter was she? Granted, her presence in the Underworld narrowed the list considerably. Hestia had no children. Hera had no other children that Zeus knew of. Poseidon's wouldn't be down in the realm of the dead and Demeter would rather let the world fall into ruin than voluntarily allow any child of hers to visit let alone dwell in the Underworld -her fit over Persephone's descent was proof of that.
Persephone. Hades. Did Hades have a daughter? It certainly appeared that he did. Well... good for him, then. Though, that complicated things at the moment. Zeus had been considering turning his charms on this lovely, young goddess but if this was indeed his brother's daughter, Hades was likely to be more than a touch protective of her.
Especially since Hades wasn't the most reasonable of his siblings.
“You'll forgive me, Makaria,” he said and fiddled a bit with his short beard, “for not knowing you on looks alone. I'm afraid it has been quite a long time.” He didn't actually say that there were so many on Olympus that unless she had really struck a chord in him in some way, he was likely to forget her name. Though, given the pretty thing she had grown into, he wasn't likely to forget again.