I don't know if this is relevant to your family, or not, but an area near Brador, Labrador (Lower North Shore) was occupied by a family with the last name of Hart. The information below is taken from the NL Provincial Archaeology reports (on-line) at -
http://www.btcrd.gov.nl.ca/pao/index.htmlThis particular quote below is from the 2015 report for the area by Patrick Jolicoeur & William W. Fitzhugh.
Good luck in your search.
Cheers
Greg Mitchell
"T he Smithsonian Arctic Studies Center re-turned to the Hart Chalet Inuit village (EiBi-47) located west of the Brador River on the Quebec Lower North Shore (LNS). The purpose of the 2015 season was to excavate a portion of the previously untested third house in or-der to verify its age and relationship to Houses 1 and 2. House 1 was partially excavated in 2014 while House 2 was only tested (Fitzhugh 2014). Both hous-es had been disturbed by land-clearing and construc-tion of the Hart cottage in the early 1960s, resulting in the destruction of their middens. House 3 was cov-ered with mature spruce trees and undisturbed