CNContactFamilyNameKey The contact’s family name. Declarationlet CNContactFamilyNameKey: String DiscussionThis key takes a string value. See AlsoNameCNContactNamePrefixKeyCNContactGivenNameKeyCNContactMiddleNameKeyCNContactPreviousFamilyNameKeyCNContactNameSuffixKeyCNContactNicknameKeyCNContactPhoneticGivenNameKeyCNContactPhoneticMiddleNameKeyCNContactPhoneticFamilyNameKey