it is very simple. they are called your grandpa.
Tutankhamuns father is called Smenkhkare
The daughter of your father's daughter is his granddaughter. She is either your niece, or your daughter.
John Maynard Keynes"Father of Economics" some says that "Adam Smith" is the real father of economics
because
Father of the Nation
Mother's father is called a grandpa.
The word for Father in German is Fater.
a father
Your Grandfather.
Simple, a goats father is called 'Dad'.
Brahmagupta is called as father of arithmatics
To your father 'Brother', to your father's father 'Son', to you 'Uncle'.
Isaac Newton is called the father of modern physics and calculus.
Father is called "ପିତା" or "ବାପୁ" in Oriya language.
The sire. And the mother is called the dam.
The father is called a boomer, the female is called a flyer and the baby is called a joey.
Religious father is called a baba. Sometimes he is also called mathadhipati.