1) Ancestor 2) Bassoon 3) Certain ancestor 4) Clock or clause 5) Exclusively Anglo word 6) Exclusively Saxon word 7) Gramps 8) Grandad 9) Granddad 10) Granddaddy 11) Grandpa 12) Grandparent 13) Poetry by Nikolay Nekrasov 14) Word with Anglo-Saxon origins 15) Word of purely Anglo origin 1) Big daddy 2) Exempt 3) Gramps 4) Grandad 5) Granddad 6) Granddaddy 7) Grandpa 8) Veteran 
• (n.) A father`s or mother`s father; an ancestor in the next degree above the father or mother in lineal ascent.
Grand'fa'ther noun A father's or mother's father; an ancestor in the next degree above the father or mother in lineal ascent. Grandfather longlegs . (Zoology) 
[n] - the father of your father or mother