No, doesn't match up but I know that in a small place like Renfrew doesn't mean their isn't a connection some where.
I have a Maria Ferguson b. 1860 and Isabella b. 1857. Let me know if you trace yours further back - maybe there is a connection further down the line.
I just got the 1881 Canadian Census; I can search by last name, region, birth place, date etc., let me know if you'd like me to look someone up for you.