Sir
Sir is a title commonly given to men who have been knighted, but also as a way to address any male, especially if his name is not known. The equivalents for a woman are "Lady" and "madam".
Sir Media
Sir Thomas Troubridge, 1st Baronet, whose entitlement to use 'Sir' derived from his position as baronet
Emperor Taishō, a Stranger Knight of the Order of the Garter, who, as a foreign national, was not entitled to use the prefix 'Sir' (which as a sovereign monarch he would not have used in any case) but was permitted to post-nominally use KG
Chithira Thirunal Balarama Varma was the last surviving Knight Grand Commander of the Order of the Star of India.
