1) Doter 2) Elder 3) Gramps 4) Gran 5) Grandad 6) Granddad 7) Granddaddy 8) Grandfather 9) Grandma 10) Grandmother 11) Grandpa 12) Grannie 13) Granny 1) Forbear 2) Forebear 3) Frequent spoiler 4) Nanna or pop 5) September honoree 6) Toddler spoiler 
Grandparents are the parents of a person`s father or mother – paternal or maternal. Every sexually-reproducing creature who is not a genetic chimera has a maximum of four genetic grandparents, eight genetic great-grandparents, sixteen genetic great-great-grandparents, etc., though the numbers can be lower due to pedigree collapse. In the histor....
(from the article `consanguinity`) ...of this principle is most easily demonstrated by example. If a brother and sister married, their offspring would have one chance in four of ...
[n] - a parent of your father or mother