 He was an Ashkenazi Jew who spoke and wrote fluent Jiddisch-Deutsch (Jewish-German, related to Yiddish), but at that time, most of the British Jews were of Sephardic descent and ritual.On January 14, 1768, Aaron wed his cousin Dorothea Catherine Judah in Portsmouth, England.Hart invested in the fur trade, then quite lucrative, and later acquired a vast amount of property, having more than seven seigneuries, notably the seigneuries of Sainte-Marguerite, Vieux-Pont, and Bécancour.