Does anyone have character duo names?

i have two puppies; brother and sister shih tzus who are both brown and white. we need to name them both and since they are so close to each other we wanted to either name them names that are character duos like pebbles and bam bam or names that just sound cute together. right now sadly we've been calling them little girl and little boy, so we need to change that. hope you have good ideas! thank you