From FamilySearch Wiki
Family Associations, Family Organizations, and Family Societies exist throughout the world, but finding them is problematic. This collection of links to the websites, Facebook pages, and if needed a mailing address, will help you find the organizations that can be helpful in your family history research. Feel free to add to the list of general resources below, or to list of specific family organizations on the alphabetical pages. Many surname societies and surname studies are registered with the Guild of One-Name Studies
so do check out their website to see if the surname of interest is listed.