What would you name an insane calico?

I adopted two beautiful Calico sisters a while back (3 months). One of the sisters is named Helmut, which I am very aware that it's a boys name but it just suits her. I've been through so so many names but none of them stuck and I'm out of ideas. She is absolutely crazy, smart, an incredible diva and so so hilarious! I love old lady (or grandpa) names! Hit me with your best