Help! Concession 9 Lochiel Ont

Myles McMillan b about 1790 married Margaret McPhee b.1792 (d/o John McPhee & Margaret McGillis)
Their daughter Margaret b 1819 married Duncan Cameron (s/o Ranald Cameron & Margaret McMillan.
Does anyone have any info? Esp re who Myles McMillan's father and mother were???