Hello Listers: I have a birthmark along lines of that described in above. Except that mine is located on the inner side of my upper left leg and not on the back of my head. I am not aware of any others in my family - my paternal grandmother was a Perkins from Hertfordshire, England. Cheers, Bob Scales R.E.(Bob)Scales, 639 Summit Place, Comox, BC Canada V9M 3H2 Telephone 250 339 4628 [email protected] Radio Amateurs of Canada VE7DHF Past District Governor Lions Club International Researching my family genealogy.