Controversial!
I don't like the name "Renfrew" for that riding. The riding's current name is terrible (I would go with "Renfrew-Algonquin" myself), but tacking on anything to it would make it worse. I wonder if a completely new name would be popular: "Upper Ottawa Valley"?.
The trouble with "Renfrew-Algonquin" is that the heart (or most "developed" part) of Algonquin Park is in Nipissing-Timiskaming--though one could always annex that into the riding, unless that made things too geographically unmanageable. (Maybe "Renfrew-Madawaska-Pembroke" as an alternative?)
I'd probably keep the Kanata-Carleton name instead of re-naming it Kanata-Bell. And I'd drop the "South" from Leeds-Grenville-South Lanark.
Or invert it to Leeds-Grenville-Lanark South, kind of like Northumberland-Peterborough South. (Which is a deceiving name, as the "Peterborough South" is P'boro *County*, not the city)