The original will of Aaron Hart (not the abstract out there on the internet) specifically states that Naphtali Hart is under 21 in November 1762 when it was both written and proved.
Stern's "First American Jewish Families" has this family wrong. The Naphtali Hart of Newport is the son of Moses Hart and Miriam Levy of New York. His brothers were Samuel, and Isaac of NY and Newport.
Therefore, the connection to Aaron Hart as stated is incorrect.
Doug Hart batjac1@hvc.rr.com