civil law. He who not being the tutor of a pupil or minor, has administered his property or affairs as if he had been, whether he thought himself legally invested with the authority of a tutor, or not. 2. He who marries a woman who is tutrix, becomes, by the marriage, a protutor. The protutor is equally responsible as the tutor.
PROTUTOR
TheLaw.com Law Dictionary & Black's Law Dictionary 2nd Ed.