Ambraüsus "Brausch" Niemann (born 7 January 1939 in Durban) is a former racing driver from South Africa. He participated in 2 Formula One World Championship Grands Prix in 1963 and 1965, both in his home country, driving a privately entered Lotus. He managed to qualify for the first of these, finishing 14th and scoring no championship points.

After success in Formula Junior in the mid-1960s, Niemann switched to enduro motor cycle racing, winning the South African championship in 1979.