Adrianus "Janus" Cornelis Theeuwes (4 April 1886 – 7 August 1975) was an archer from the Netherlands.

He owned a leather factory (Theeuwes Van de Maade) and was father of seven daughters and one son.

He was born in Gilze en Rijen and died in Tilburg.

He represented his native country at the 1920 Summer Olympics in Antwerp, Belgium.

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