Brigadier Hendrik Jacobus Greyvenstein SM (July 11, 1916 – March 15, 1986) was a senior officer in the South African Army from the artillery.

He was educated at the University of Pretoria and took part in the Second World War as an artilleryman.

Greyvenstein graduated from the British Overseas School in Egypt during the Second World War and completed the SA Military College Staff course.

He served as Chief Instructor Gunnery during the fifties, Battery Commander at 1 South African Infantry Battalion in Oudtshoorn.

Brigadier Greyvenstein served at General Headquarters, Chief of Staff section before he retired in the mid seventies.