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Adrian Cornelius Langerwerf (born Adrianus Cornelis Langerwerf; 15 September 1876 – 7 April 1935) was a New Zealand Catholic missionary and writer. He was born in Waspik, Netherlands, the son of Cornelis Bartels Langerwerf (1835–1881) and Lucia Smeur (1845–1890), on 15 September 1876.