Rainier II, Lord of Monaco, was the monarch of Monaco from June 29, 1352 to August 15, 1357. He was the son of Charles I, Lord of Monaco, and Lucchina Spinola. He ruled jointly with his father Charles I, Lord of Monaco, his father's uncle Antonio, Lord of Monaco and his brother Gabriele, Lord of Monaco. He yielded Monaco to the besieging Genoese for 20,000 florins but retained Menton and Roquebrune. The Genoese then ruled the country until January 1395.
He was Admiral of Languedoc and Seneschal of Piedmont