Johannes Christoffel Jan Mastenbroek
|Full name||Johannes Christoffel Jan Mastenbroek|
|Date of birth||5 July 1902|
|Place of birth||Dordrecht|
|Date of death||23 May 1978(aged 75)|
|Dutch East Indies|
Mastenbroek was born and raised in Dordrecht, son of Klaas Mastenbroek, a tailor, and Goverdina Rackwitsz. In 1924 he married Johanna van den Bovenkamp in Hengelo, at which time he was a school teacher.
He was chairman of the Nederlandsch-Indische Voetbal Unie (Dutch East Indies football association) and vice-president of the Dutch East Indies Olympic Committee.