Det de Beus, Dutch field hockey player (b. 1958)
Anna Maria Bernadette "Det" de Beus (18 February 1958 – 21 July 2013) in the Netherlands. Born in Utrecht, she was the first goalkeeper in women's field hockey to wear a mask.

A player from Eindhovense Mixed Hockey Club in Eindhoven, De Beus played in goal for the Netherlands between 1978 and 1988. She played 105 caps for her country and was part of the gold medal winning Olympic team in the 1984 Summer Olympics in Los Angeles. She retired from the sport at the end of Olympic Games in Seoul in September 1988 after winning the bronze medal by beating Great Britain 3–1.

She died of cancer in Rijswijk in July 2013.