Claudio "Dingdong" Ong Teehankee, CCLH (simplified Chinese: 郑建祥; traditional Chinese: 鄭建祥; April 18, 1918 – November 27, 1989) was the 16th Chief Justice of the Supreme Court of the Philippines from 1987 to 1988.

He was also the most senior associate justice and chairman of the First Division of the Supreme Court of the Philippines.

Teehankee was born on April 18, 1918, in Manila, Philippines as the seventh child of Dr. Tee Han Kee and Julia Ong, an ethnic Chinese born in the Philippines.^[2]

His father, José Tee Han Kee (simplified Chinese: 郑汉淇; traditional Chinese: 鄭漢淇; pinyin: Zhèng Hànqí; Pe̍h-ōe-jī: Tīⁿ Hàn-kî), immigrated to the Philippines in 1901 from Fujian province in China. He was a close associate and friend of Sun Yat-Sen, and was active in the struggle to liberate China from the Qing dynasty. Dr. Tee Han Kee later became the founding director of Chinese General Hospital.^[3][4] Claudio learned to write in fluent Chinese, and contributed multiple articles later on for the Chinese-language newspaper The Fookien Times Yearbook from 1966 to 1968.^[5]

He received his A.B. summa cum laude in 1938 and LL.B. with the only summa cum laude in the school as part of the second batch in 1940 at the Ateneo de Manila. He also garnered first place in the 1940 bar examination with an average of 94.35 percent.^[6]

Teehankee was Marcos's lawyer in the libel case regarding the movie, Iginuhit ng Tadhana, then became Secretary of Justice under the Marcos administration in 1967 before being appointed as associate justice in 1968.^[7]

He was known as the court's "activist" justice because of his dissenting opinions in many vital cases affecting the Marcos administration. He was the lone dissenter in many cases, such as the High Tribunal's decision upholding the constitutionality of the Judiciary Reorganization Act of 1980. He also dissented in policies which would seem to curtail the basic liberties of people. For a time, Teehankee and Justice Cecilia Muñoz-Palma would dissent together. After Muñoz-Palma's retirement, he was joined by Associate Justice Vicente Abad Santos in dissenting.^[8]

It was this activism that made Marcos 'by-pass' him twice for the position of Chief Justice (the most senior associate justice is most likely to succeed after the retirement of the Chief Justice) in 1985. It was after the removal of Marcos that he was appointed Chief Justice by Corazon Aquino in 1987.^[5][9]

After his retirement, he was appointed as the Philippine Ambassador to the United Nations, where he died of cancer in Manhattan, New York on November 27, 1989, at the age of 71. He is interred at the Libingan ng mga Bayani.

Teehankee was married to Pilar D. Javier with whom he had nine children. Like Teehankee, his son Manuel Antonio topped the bar in 1983 and also became a diplomat.^[10] He was also the uncle of Political Science professor Julio C. Teehankee.^[11]

His son Claudio Jr. would be imprisoned for homicide in the early 1990s. The death penalty was reinstated because of concurrent debates after reactions to the public sentence were mixed.

• Chief Justice of the Supreme Court of the Philippines
• Associate Justice of the Supreme Court of the Philippines
• Supreme Court of the Philippines
• Constitution of the Philippines