Free DNA tests/Corson
From ISOGG Wiki
Free 37-marker DNA tests are available for men who can document at least 3 generations of male-line descent from a progenitor with the surname CORSON, COURSON, CURZON, COURCON, or a similar variant who was born in Europe, particularly Scotland, France, or England.
Courson, Coursen, Curzon, Colson, Corsa, Coursey, Vroom
For further information, contact the administrator of the Corson DNA project.