'Grandson' in the Bible

When Mephibosheth, Jonathan's son and a grandson of Saul, approached David, he threw himself on his face out of respect. "Mephibosheth!" David said as he greeted him. "Hello! I am your servant," he replied.

Then the king summoned Saul’s attendant Ziba and said to him, “I have given to your master’s grandson all that belonged to Saul and his family.

You, your sons, and your servants are to work the ground for him, and you are to bring in the crops so your master’s grandson will have food to eat. But Mephibosheth, your master’s grandson, is always to eat at my table.” Now Ziba had 15 sons and 20 servants.

The king asked, "Where is your master's grandson?" Ziba replied to the king, "He remains in Jerusalem, for he said, 'Today the house of Israel will give back to me my grandfather's kingdom.'"

Mephibosheth, Saul’s grandson, also went down to meet the king. He had not taken care of his feet, trimmed his mustache, or washed his clothes from the day the king left until the day he returned safely.