'Grandfather' in the Bible
And there was the LORD, standing above it and telling Jacob, "I am the LORD God of your grandfather Abraham. I'm Isaac's God, too. I'm giving you and your descendants the ground on which you're sleeping.
“Don’t be afraid,” David said to him, “since I intend to show you kindness because of your father Jonathan. I will restore to you all your grandfather Saul’s fields, and you will always eat meals at my table.”
Then the king said, “And where is your master’s son [Mephibosheth]?” Ziba said to the king, “Behold, he remains in Jerusalem, for he said, ‘Today the house of Israel will give me back the kingdom of my father.’”
After all, there was no one in the entire house of my grandfather who did not deserve death from my lord the king. But instead you allowed me to eat at your own table! What further claim do I have to ask the king for anything?"
Under the influence of wine, Belshazzar ordered that the gold and silver vessels his grandfather Nebuchadnezzar had taken from the Temple in Jerusalem be brought in so the king, his officials, his wives, and his mistresses could drink from them.
There's a man in your kingdom in whom dwells the spirit of the holy gods. During your grandfather's reign, he was found to have insight, intelligence, and wisdom, like that of the gods. Your grandfather, King Nebuchadnezzar your kingly predecessor appointed him to be chief administrator over the magicians, enchanters, Chaldeans, and astrologers,
Then Daniel was brought before the king. The king spoke up and told Daniel, "So you are Daniel, one of the Judean exiles whom my grandfather the king brought from Judah!