Petrus Jozef Sietze "Piet" de Jong (known as 'Oom Piet', or 'Uncle Piet') (born 3 April 1915) is a retired
Dutch politician. He was
prime minister of the Netherlands from 1967 until 1971. He was also a member of the catholic
KVP party.
Early years and service
De Jong was born in
Apeldoorn and graduated from the
Royal Netherlands Naval College in 1934 after which he served as a naval officer. During
World War II he commanded the Dutch
submarine 'Hr. Ms. 0-24'. In 1947 he joined the Naval Staff. In 1951 and 1952 he commanded the
frigate 'Hr. Ms. De Zeeuw'. He then joined the 'Allied Commander-in-Chief Channel' in
Portsmouth. In 1955 he was appointed acting chief of staff of the Navy Inspector-General,
Bernhard of Lippe-Biesterfeld, and
Aide-de-camp of the latter's wife Queen
Juliana of the Netherlands. In 1958 he commanded the destroyer 'Hr. Ms. Gelderland'.
Prime minister
He became involved in politics in 1959, being appointed deputy minister of defence. In 1963 he became minister of defence and in 1967 he became prime minister.