I don't know for certain if we are related (yet!)... But there is a good chance. I have a few Ewen McLure's in my tree - none that I can find married to Mary MacIntosh though. Were they married in Scotland?or Canada? Do you know who your Ewen's parents were, and when/where he was born? I have several McLure birth & marriage certificates from Skye - chances are I might have a lot of info on your family from earlier generations.
Let me have some more details, and I will check again.:-)