Hello Alan, To answer your question, a "cautioner" was a person who stood as surety for the person who was subject of the entry. The term is used in a variety of Scottish legal documents as well as marriage records. You don't describe the record in precise terms, but in the entry to which you refer, the bride's father is making a guarantee that his daughter will follow through on the marriage contract. Hope this answers your question. Doug Nicol, Santa Rosa CA