I too have no known Scottish heritage... non that has been documented that is.
But I do love men who wear kilts! I love the way they stand with pride and laugh with vigor.
I have lived in Germany as a small child and we always celebrated Christmas with a number of German traditions. I don't put food color in my beer on St Paddy's Day and I think green meat is just 'Wrong!'.
I think it is wonderful that we as Americans are open minded enough to want to learn about and celebrate things from other nations. We are a melting pot but I am American. Red White and Blue, through and through! Perhaps that is why my husband and I have not opted for a clan tartan based on name.
When I wear a tartan it is MacLaren because of my Woodbadge/ Scouting. I am a member of the World Brotherhood of Scouts and as such MacLaren is my tartan. I always make that distinction when asked about my 'clan' not because I wouldn't be proud to be part of clan MacLaren by blood.. or any other... just because the fact I'm not.