Have you heard of any King who has voluntarily abdicated the throne for his son?

Answer 1

King Jigme Singye Wangchuk of Bhutan did for his son just last week.

Answer 2

The greatest example of a ruler who abdicated must be Charles V, who was, among many other things, the Holy Roman Emperor. His domains were so large that when he abdicated he shared his lands among his family.

In 1556 Charles abdicated his various titles, giving his personal empire to his son, Philip II of Spain, and the Holy Empire to his brother, Ferdinand. Charles retired to the monastery of Yuste in Extremadura, but continued to correspond widely and kept an interest in the situation of the empire. He suffered from severe gout and some scholars think Charles V decided to abdicate after a gout attack in 1552 forced him to postpone an attempt to recapture the French city of Metz, where he was later defeated.[4].

Charles died on September 21, 1558. Twenty-six years later his remains were transferred to the Royal Pantheon of The Monastery of San Lorenzo de El Escorial.

Answer 3

Yes, King David of Israel and Judah abdicated in favour of his son Solomon. From the Jewish Virtual Library: "Solomon was the son of King David and Bathsheba. Solomon was not the oldest son of David, but David promised Bathsheba that Solomon would be the next king. When David’s elder son Adonijah declared himself king, David ordered his servants to bring Solomon to the Gihon spring where the priest anointed him while David was still alive. Solomon inherited a considerable empire from his father."

Answer 4

King Farouk