Very interesting!I'm doing some Malloch research and have something that might help, or might not, such is the process!
My grandmother was a Malloch, daughter amongst many siblings of Edward C. Malloch (III, M.D.) who lived primarily in the Ottawa area of Ontario, Can.His parents, Edward Crookshanks Malloch (II, M.P.) born in Glasgow, 1801, married (upper Can, Richmond, Ontario) to Margaret Lindsay Hill (B.1891 Amherstburg, Up.Can) in 1877.He died in Smith's Falls, Ontario 1887.He was son of Edward Cruickshanks Malloch (I), born in Burnside Dupplin, Perthshire, Scotland in 1773, married Ann Barland (1774, Perth, Scotland). Many of this line are buried in Beechwood Cemetary in Ottawa, Ontario and another branch ended up in a Brockville, Ontario cemetary.The metis connection is quite possible.I do not know when Edward Cruickshanks Malloch (I) first came to Canada or where he settled.He lived until he was about 86 - not bad for the times.I have more names that fill in these generations, but nothing further back.