Mine were Pamela (Pam) and Barbara (Barb). Also had great-aunts Mary & Marlene.

I'm not using either of my grand-parent's names, but my Dad & brother and DH's dad all have James as a middle name so we'll use that as a middle name for a boy. Plus DH's mum's name is Mary and that just happens to be my Mum's middle name, so we'll use Mary as a middle name for a girl. Made it very easy for us!