In The Three Musketeers his family name is du Vallon. In Twenty Years After, having made a financially advantageous marriage, he is first known as du Vallon de Bracieux de Pierrefonds, before he earns the title of baron.
Porthos, honest and slightly gullible, is the extrovert of the group, enjoying wine, women and song. Though he is often seen as the comic relief, he is also extremely dedicated and loyal toward his friends and fellow Musketeers. His eating abilities even impress King Louis XIV during a banquet at Versailles. As the story advances, he looks more and more of a giant, and his death is that of a titan.
At the time of The Three Musketeers (ca. 1627) he apparently has few lands or other resources to draw from. He was finally able to extract sufficient funds from an elderly lawyer's somewhat younger wife (whom he was romancing and later married) to equip himself for the Siege of La Rochelle.