Found this thread this evening ;-)
I'm also named Jaffré, e with '. I think the original way to write the name.
The root of the name is in Bretagne in Ouest of France
Have a looke here :
http://www.genealogie.com/v2/services-nom-de-famille/nom.aspand
http://www.genealogie.com/v2/services-nom-de-famille/nom.asp...