The surname Gamboa is from Southern European origin. The name might of been started in the Philli's and Asia when the Spanish invaded the Philli's. Some where in the line a Spanish guy mated with a Asian girl. The surname Gamboa with no doubt is from Basque origin. Countries such as Italy, Spain, and others also have a big population of the Gamboa surname. I am no trying t ffend you but Gamboa is from Basque origin.