New Puppy - Tiny SHi-Chi - she needs a name

We have a new family member.   A tiny puppy that looks like a guinea pig.  She is a shiatsu and Chihuahua mix.  So very tiny we have to give her cat toys to play with.  We cant figure a name for her yet we are considering Buttercup, Twinkles, Darlin, Muffin, Thumper, but we need something really cute and precious.;  My Sister adopted my pups sister so we have twins in the family.