I believe that's "Bandurria."

A similar, but larger instrument is the "Laûd"

I've seen them listed in the Lark in the Morning website and catalog. All kinds of odd-ball and exotic instruments from all over the world. I've never dealt with them myself, but I have a friend who is not real fond of them. She refers to them as "Shark in the Morning."

So caveat emptor

Good hunting.

Don Firth