Gastaldus
A New Law Dictionary and Glossary · Alexander M. Burrill · 1850
A New Law Dictionary and Glossary
Gastaldius, Gastaldio, Guastaldus. L. Lat. & Lomb. [from Sax. gast, a ^uest, and haldian, to keep or take care of.] In old European law. A steward, seneschal, bailiff or major-domo.
Spelman.
Applied also to higher officers, as the governor of a city or province. Id, ibid.