Rainier I of Monaco, Lord of Cagnes

Rainier I of Monaco (1267–1314) was the first sovereign Grimaldi ruler of the area now known as Monaco. He also held the title of Lord of Cagnes. Cagnes was the town where in 1309 he established a stronghold, today known as the  Château Grimaldi Additionally, he was Baron of San Demetrio (Kingdom of Naples). He was the eldest of the three sons of Lanfranco Grimaldi, French Vicar of Provence, by his wife, Aurelia del Carretto (who later remarried her husband's cousin, François Grimaldi).https://grokipedia.com/page/Rainier_I_of_Monaco,_Lord_of_Cagnes

In 1304, he was appointed Admiral of France after winning the Battle of Zierikzee.

He married twice: firstly, Salvatica del Carretto, daughter of Giacomo del Carretto, Margrave of Finale. They had four children:

 Charles I, his successor.
 Vinciguerra, who married Costanza Ruffa.
 Salvaggia, who married Gabriele Vento.
 Luca, Lord of Villefranche; married firstly Tedise, daughter of Daniel Cybo, and secondly Caterina Caracciolo.

Secondly, Rainier I married Andriola Grillo. This marriage was childless.https://www.hellomonaco.com/sightseeing/grimaldi-family/rainier-i-the-first-lord-of-monaco/
References

Category:1267 births
Category:1314 deaths
Category:House of Grimaldi
Category:Admirals of France