His grandfather's grandfather was called his great-great-grandfather.
If the " old man " here was a person's name, then his grandfather could usually be called grandfather or grandfather. In some areas, there might be other titles, such as Master. If there was a mistake in the description here, he would like to ask about his grandfather's grandfather. According to the order of address for the eighteen generations of ancestors, his grandfather's grandfather was his great-grandfather. If he wanted to ask about his grandfather's father, he would address him as great-grandfather or great-grandfather.
" Grandfather " and " grandpa " usually referred to the same person, both of which were the names of the father's father." Old grandpa " could also refer to grandfather, but it was a more spoken, intimate, or respectful term.
His father's grandfather was called great-great-grandfather.
In the traditional China family hierarchy, grandfather was the father of father, great-grandfather was the father of grandfather, and great-great-grandfather was the father of great-grandfather. In the common family hierarchy, there was no such standard address as " great-grandfather." If one were to infer according to the logic of family seniority, great-grandfather might be an ancestor who was one generation higher than great-great-grandfather, but this was not the traditional family seniority title.
His great-grandfather's father called him Tianzu. According to the explanation of Er Ya, the father of Gaozu was called Tianzu.
His father was called the Heavenly Ancestor. Gaozu's father was called the Heavenly Ancestor. According to the records in Er Ya, the one who gave birth to him was his parents, the father of his father was his grandfather, the father of his grandfather was his great-grandfather, the father of his great-grandfather was his great-grandfather, and the father of his great-grandfather was his great-grandfather. Thus, the title of the great-great-grandfather's father was Heavenly Ancestor.
His father's grandfather was called great-great-grandfather, or great-grandfather.
Great-grandfather, great-grandfather, and great-grandfather were the Chinese names for family members. According to the information provided, his great-grandfather was the third generation, and his great-grandfather was the fourth generation. However, there was no clear explanation regarding the Mystic Ancestor in the information provided. Thus, it was impossible to determine the seniority of the Mystic Ancestor.
The descendants of Gaozu were called great-grandchildren.
His great-great-grandfather's father was called the Heavenly Ancestor.