Another job for DNA. Officer of British garrison in Boston with Montcalm, killed by Indians in retreat from Fort William Henry. Possible wife, daughter of Indian chief, one of the 6 tribes that allied with English. Major Jonas feared for the safety of his children and placed them in the home of relatives in Bradford.
Alternatively "There exists no record of his marriage, and it is possible that he married twice. He had at least eight children by his one or two wives, and served in the French and Indian War. No record exists of his death or of the deaths of either of his wives."
"Not all of those bearing th ename of Hardy in the French and Indian War were colonists. Some were members of the regular British Army and came over here to fight for their cousins against a common enemy. Among them was one Jonas Hardy, a close relative of the Hardys of Bradford MA. This Jonas Hardy was a Major in the English Army and saw service at Fort William Henry, Lake Champlain and vicinity. He was in charge of the garrison at Boston MA and soon after his arrival in this country he met and married the daughter of an Indian Chiefo of one of the six tribes then allied with, England. To them were born two sons, one of them named Jonas in honor of his distinguished father. They were verry toung children and living with their princess mother at Boston MA when Fort William Henry was besieged by General Montcalm and his Indian allies 8/10/1757. Mjr. Hardy was at the Fort with British General Monro when it was attacked...English surrendered...treaty drawn up...but the Hurons disregarded and killed many including Hardy. ... Comrades knew of relatives in Bradford, took children (Jonas Jr. and Oliver) and wife to live with Jonas Hardy. Sons moved to NH."
"b.11/19/1721 Bradford MA d. a1764" is presumably the Bradford Jonas that Jonas Jr and Oliver were sent to live with, not an ancestor.
or maybe the Fort William story is hogwash. See: The Ancestry of J.G. Williams & Ursula Miller By Jim Schneider, Holly Rubin