Knights Grand Cross and Knights Commanders prefix "Sir", and Dames Grand Cross and Dames Commanders prefix "Dame", to their forenames. Wives of Knights may prefix "Lady" to their surnames, but no equivalent privilege exists for husbands of Dames. Such forms are not used by peers and princes, except when the names of the former are written out in their fullest forms. Furthermore, honorary (foreign) members and clergymen do not receive the accolade and thus are not entitled to use the prefix "Sir" or "Dame". Knights and Dames Grand Cross use the post-nominal "GCMG"; Knights Commanders and Dames Commanders use "KCMG" and "DCMG" respectively; Companions use "CMG".