Some call em Grandfather or Granddad, Grandpa or Gramps.
In my family we call him Papaw.  
Papaw always sits at the head of the table
during holiday meals, always sits at the front
of the living room while we open Christmas
gifts. Then one year he gave up his seat at
the table for me. He did
this for 2 reasons: #1. So I could
easily pull my wheelchair up to the table.
#2. So someone could easily sit beside
me to help me eat. Nothing breaks all day tradition
besides Papaw’s compassion.