When I see the ethnicity box on any form w/a phrase such as Caucasian or White I simply cross it out and hand write 'Celtic/Saxon' as my heritage is Welsh/English on both sides of my family tree. Have been doing it for years and will continue to do so. Caucasian is just too broad a term and though we may have all originated in Africa thousands of years ago I think 3-400 years back is far enough to define one's ethnic origins should it be necessary.