Still, there's a Portuguese version that spells it CARVALHO, and that's rarely researched and the more modern spelling found frequently in Mexico is CARBOHAL.
A priest named Luis Carvajal was the first European to explore the Amazon and another Carvajal discovered Puerto Rico. A Carvajal founded the Portuguese colony in Labrador (which was gone by 1535). Les Carbo founded St. Sauveur. Carvajals were the first men known to travel all the way around the world. A Carvajal became the King of Portugual and rebuilt Lisbon after the Great Earthquake. The French Kings regularly awarded the Order of Carvajal, represented by an enormous red bull (a masculinized red heifer maybe?) to various favorites.
These guys were everywhere, did everything, and kicked butts and took names all the time!
I love it! Who said history is dead, or even dry?