Hugh Howard Macdonald - Nova Scotia

My ggrandfather Hugh Howard MacDonald was born in Nova Scotia c1866.  From my DNA results
(FTDNA Clan Donald USA project) I find I am most closely related to the line that came from John
" Soldier " MacDonald who came from Moidart or Arisaig SCO 1790 on the Dunkeld and settled in Pictou county NS.  Any leads appreciated.   Ray