My mother had a cousin who was a geneologist and she found out that there is a tartan plaid called Blackwatch Plaid. It is also used by the McBride Clan. The McBride Clan is a very large one and McBurney, McBernie, and McBirney are all sub clans. My parents Edward H. McBurney and Imogene McBurney travelled to Ireland and purchased a blazer for my dad and fabric for my mother. There is also a crest, and you will find it listed as the McBride crest. There are two types of plaid, a formal one "Blackwatch" and a casual one that looks like the Stewart plaid. You can find both in any Irish or Scottish shop.