Hellmuth is both a masculine German given name and a surname. Notable people with the name include:
Given name: Hellmuth Heye (1895–1970), German admiral and politician Hellmuth Hirth (1886–1938), German engineer who founded engine manufacturing companies Hellmuth Karasek (1934–2015), German journalist, literary critic, novelist and author Hellmuth Mäder (1908–1984), German general Hellmuth von Mücke (1881–1957), German Navy officer, pacifist writer Hellmuth Reymann (1892–1988), German Army officer Hellmuth Walter (1900–1980), German engineer who pioneered research into rocket engines and gas turbines Hellmuth Wolff (organ builder) (1937–2013), Canadian organ builder
Surname: Isaac Hellmuth (1819–1901), founder of Huron University College and the University of Western Ontario Otto Hellmuth (1896–1968), member of the Nazi party George Francis Hellmuth (1907–1999), American architect based in St. Louis, Missouri Phil Hellmuth (born 1964), American poker player
See also Hellmuth, Obata and Kassabaum, an architecture-engineering firm Helmuth