My Grandfather Name

My youngest daughter recently asked me what I would like the fuure Grandchildren to call me and I would like to point out here that at 16 I hope she won't be presenting me with any anytime soon.

My Dad's Dad was Pa, my Mum's Dad was Grandad and my Dad was Grandad, so I thought I would go for something different.  I will be Obi Wan much to the disgust of my daughters who have revoked the right for me to name myself.