Oswald Pirow, QC (Aberdeen, Cape Colony (now Eastern Cape South Africa), 14 August 1890 – Pretoria, Transvaal, Union of South Africa , 11 October 1959) was a South African lawyer and far right politician, who held office as minister of Justice, and later minister of Defence for the National and United Party respectively. Pirow eventually left the UP upon the Second World War and joined Daniel Malan's reunited National Party, eventually broke within Malan founded the New Order, a marginal proto-fascist group which dissembled before the end of the war. A celebrated jurist, including by later president Nelson Mandela, he served the NP government as a prosecutor in the Treason Trial until his death.