This from an article in the AZ Republic...
In honor of Dave Anderson, the founder of Famous Dave's of America, anyone with the first name of Dave, David or Davy gets a free entree on Sunday (Aug. 1). Maximum entree value: $15. Anyone with a middle name of Dave, David or Davy gets a half-price entree. Maximum value: $7.50. Offer valid dine-in or to-go. Must show photo ID.