Tengku Mahmood Mahyideen

His Highness Dato'
Tengku Mahmood Mahyideen
تڠكو محمود مهيدين‎
DPMK SMK MBE
His Highness Dato' Tengku Mahmood Mahyideen; تڠكو محمود مهيدين‎ DPMK SMK MBE
	Tengku Mahmood Mahyideen in Force 136's formals.
Founder and Chairman GAMPAR
	In office; 1948–1953
Director of Education (Kelantan)
	In office; 1938–1942
Born	Tengku Mahmood Mahyideen bin Tengku Abdul Kadir Kamaruddeen; 28 October 1908; Chabang Tiga, Patani, Siam; (now known as Chabang Tiko, Pattani, part of Thailand)
Died	12 February 1954 (aged 45); Pantai Cinta Berahi, Kelantan, Federation of Malaya; (now part of Malaysia)
Resting place	Kelantan Royal Mausoleum
Other names	Tengku Mahmud Mahyideen, Mahmud Mahyideen, Raja Mopeng (Radio's pseudonym)
Alma mater	Penang Free School; Assumption College (Thailand)
Occupations	Businessman; government servant; radio announcer; spymaster; reserve military officer;
Years active	1928–1954
Known for	The icon of the independence movement, the Malay people's first SOE agent, and the reformer of Malay education
Political party	PKMM (1945) ; UMNO (1950-1954)
Other political; affiliations	GAMPAR (1948-1953)
Opponent	Onn Jaafar (UMNO)
Spouse	Tengku Zainab Tuan Long Senik (m. 1930)
Children	4
Awards	Order of the Crown of Kelantan (DPMK); Member of the Order of the British Empire (MBE);
House	Long Yunus
Father	Sultan Abdul Kadir of Patani
Mother	Che Maimunah (birth mother); Tengku Kembang (step-mother)
Military career
Nicknames	Harimau Malaya (Malayan Tiger); Lion of Malaya;
Allegiance	Allied forces
Branch	Unfederated Malay States Volunteer Forces (1939–1942); British Indian Army (1942–1945); Special Operations Executive (1942–1945);
Service years	1939–1945
Rank	Sergeant (Unfederated Malay States Volunteer Forces); Major (British Indian Army);
Unit	Kelantan Volunteer Force (1939–1942); Force 136 (1942–1945);
Commands	Malay Section of Force 136
Conflict	Franco–Thai War World War II Malayan campaign Battle of Kota Bharu; Battle of Singapore; Operation Beacon; Operation Fighter; Operation Gustavus; Operation Hebrides; Operation Oatmeal; Operation Zipper; ; ;

Tengku Mahmood Mahyideen (Jawi: تڠكو محمود مهيدين‎; 28 October 1908–12 February 1954), also known by his nickname Harimau Malaya (Malayan Tiger), was a Siamese-born Malayan–Pattani prince, freedom fighter, businessman, radio announcer, and spymaster in the service of the British Special Operations Executive (SOE). Widely recognised as an "icon of the independence movement", he was regarded by some as a pretender to the throne of the historical Patani Kingdom.

Mahyideen played a prominent role as a reformer of Malays education in Kelantan, acted as a patron of school cooperatives in the state, and established himself as a successful entrepreneur. During the Second World War, he became the first Malay to be recruited as an SOE agent, gaining further renown for his leadership of Force 136's Malay Section. In the post-war years, he served as a member of the Federal Legislative Council of Malaya and founded the Greater Patani Malay Association (Malay: Gabongan Melayu Patani Raya, GAMPAR), of which he was chairman.

Because of variations in the transliteration of Jawi script into the Latin alphabet, his name has appeared in several spellings, including Tengku Mahmood Mahyiddeen and Tengku Mahmud Mahyideen. Other variants such as Mahydeen, Mahyiddin, Mahyidden, and Muyidu'd-in were also used by him in personal writings and official correspondence.