The Collaborative International Dictionary
Propretor
Propretor \Pro*pre"tor\, n. [L. propraetor; pro for, before + praetor a pretor.] (Rom. Antiq.) A magistrate who, having been pretor at home, was appointed to the government of a province. [Written also propr[ae]tor.]
Wiktionary
propretor
n. (alternative spelling of proprætor English)