Zamorin (Samoothiri; Malayalam: സാമൂതിരി, Portuguese: Samorim, Dutch: Samorijn) of Calicut is the hereditary royal title used by the Hindu rulers of the medieval Kingdom of Calicut on Malabar Coast. The Zamorins ruled for almost six centuries, between c. 12th and 18th century AD based at the city of Calicut, the one of most important trading centre in South India. At the zenith in the 15th century, the kingdom covered almost all of present day northern and central regions of Kerala state.

It was after the disintegration of the Later Chera Kingdom in early 12th century, the Zamorins (originally Eradis of Nediyirippu Swarūpam) became completely independent and became a powerful economic and naval force. The relative absence of intra-family quarrels and splits like other Nair royalties was one of the factors in the dramatic success of the Zamorins. They had good trade relations with the Muslim-Arabs and Chinese, the primary spice traders on the Malabar Coast in the Middle Ages. The Kunhali Marakkars, the famous Muslim admirals, were the naval chiefs of the Zamorins. The Zamorins held most of the other important trading ports on the across Malabar Coast. The control over these ports provided the Zamorin a vast income of foreign money. They fought numerous battles with their local neighbors, prominently with Valluvanad, Palghat, Cannanore and Cochin, for supremacy over the ports and the fertile banks of the River Nila. The wars with an alliance of Valluvanad and Cochin is related to the famous Mamankam festivals.

Kasinather Saunthararajah S.C., P.B.M. (3 March 1930 – 17 June 2010), known professionally as K.S. Rajah, was a Senior Counsel and former Judicial Commissioner of the Supreme Court of Singapore. Born in Penang, he came to Singapore in 1950 and worked as a teacher before embarking on part-time law studies at what was later known as the University of Singapore, graduating in 1963 with a Bachelor of Laws with honours (LL.B. (Hons.)). He then spent the next 22 years with the Singapore Legal Service, eventually heading the civil and criminal divisions of the Attorney-General's Chambers and also serving as Director of the Singapore Legal Aid Bureau and head of the Official Assignee and Public Trustee's Office. In 1985 he retired from the Legal Service and went into private practice, establishing the firm of B. Rao & K.S. Rajah.

In 1991, Rajah was appointed a Judicial Commissioner of the Supreme Court of Singapore. His time on the Bench was marked by a number of significant family law cases, including one in 1991 in which he held that since the gender of a transsexual person was to be determined according to biological criteria, sex reassignment surgery did not alter a person's gender. Thus, a marriage between an individual who had undergone a female-to-male sex change operation and a woman was void, being a marriage between two persons of the same gender. The decision prompted Parliament to amend the Women's Charter in 1996 to permit transsexual people to marry in the capacity of their new gender.