Hubby and I can't agree on a name for babygirl.

We have a son named Sebastian, and hubby wants babygirl to have a long name as well but I feel like it should short and sweet. He likes Liliana, but saying both Sebastian and Liliana is soo much. I like Lyla, which is short and he says it's too basic. We're not really nick name people so if we'd name her Liliana she'd go by that and not lily which is another short name.

Do you guys think we should do another long name or a short name? To add, our son had 27 letters in his whole name.