My step-mom is pregnant... name for sister for Robbie and Chelsea? ?

My step-mom is pregnant with a baby girl and has told me and my step-brother Robbie that we should be involved in the baby naming process. There are no major names that are being debated so any ideas would be nice. My step-mom loved the name Peyton but my dad's sister just named her daughter that so we can't use it. Thanks in advance :)