Grandfather, grandad, grandpa..depends on the person
People from London NEVER call it 'London England', they just call it London. Only people from the USA call it 'London England'.
할아버지 (Hara buhjee)
In Pakistan most of people call their grandfathers as "Dada". This is common word and every single Pakistani is familiar with it.
Your grandfather's brother is your great uncle.
Your father's grandfather is your great grandfather.
He would be your great great uncle, but you could call him whatever endearing name you both prefer. my great grandfathers brother or my great uncle
Two people whose grandfathers were brothers are second cousins to each other.
Here in England we call Mount Everest just that......Mount Everest.
England is the country name. People from England are English. Things from England are English. The language of England is English.
Grandma - or grandmother
Presents or gifts.
The possessive form of the plural noun grandfathers is grandfathers'.example: Both of my grandfathers' names are George.