Half my Grandkids call Grandpa ++++++, my Army Nick given out to my Daughter in a moment of weakness, I hated the name given to me by a semi literate Polack PhD, good friend, who couldn't pronounce W's and passed on to a friend with whom I served in Viet Nam, before he Chickened out and became a Dog Humper, Scout Dogs.
The rest call me Grandpa Bill. This is because my son's life would be in danger if they call me anything Else.