Commander, or Knight Commander, is a title of honor prevalent in chivalric orders and fraternal orders.

Grand Cross is the highest class in many orders, and manifested in its insignia. Exceptionally, the highest class may be referred to as Grand Cordon or equivalent. In other cases, there may exist a rank even higher than Grand Cross, e.g. Grand Collar. In rare cases, the insignia itself is referred to as the "grand cross".