Ruud and Rud are surnames of Norwegian origin. Both are also Norwegian place names of numerous farmsteads named Rud or Ruud from Old Norse ruð meaning clearing. Ruud is also a Dutch masculine given name meaning "famous wolf" although it is also often short for Rudolf.

• Asbjørn Ruud (1919–1986), Norwegian ski jumper
• Barrett Ruud (born 1983), American football linebacker
• Birger Ruud (1911–1998), Norwegian ski jumper
• Bo Ruud (born 1984), American football linebacker
• Casper Ruud (born 1998), Norwegian tennis player
• Christian Ruud (born 1972), Norwegian tennis player
• David Ruud (born 1980), Swedish motorcycle speedway rider
• Edwin Ruud (1854–1932), Norwegian-American mechanical engineer and inventor
• Espen Ruud (born 1984), Norwegian football defender
• Joseph Ruud (born 1981), American professional wrestler better known as (Erick) Rowan
• Maria Ruud (born 1960), American politician and a member of the Minnesota House of Representatives
• Millard Ruud (1917–1997), legal scholar
• Ole Ruud (born 1958), Norwegian conductor
• Roger Ruud (born 1958), Norwegian ski jumper
• Sif Ruud (1916–2011), Swedish film actress
• Sigmund Ruud (1907–1994), Norwegian ski jumper
• Tom Ruud (born 1953), American professional football player
• William Ruud (born 1952), American educator, president of University of Northern Iowa

• Adolf Rüd, Hauptscharführer in the Waffen SS during World War II
• Jon Rud (born 1986), Danish swimmer who participated at the 2008 Summer Olympics
• Nils Johan Rud (1908–1993), Norwegian novelist, writer of short stories children's writer, and magazine editor
• Ove Rud (1923–2007), Danish film actor

• Ruud Boffin (born 1987), Belgian footballer
• Ruud Brood (born 1962), Dutch footballer
• Ruud de Wild (born 1969), Dutch radio host
• Ruud Geels (1948–2023), Dutch footballer
• Ruud Gullit (born 1962), Dutch footballer
• Ruud Hesp (born 1965), Dutch football goalkeeper
• Ruud Heus (born 1961), Dutch footballer
• Ruud Janssen (born 1959), Dutch blogger
• Ruud Jolie (born 1976), Dutch musician
• Ruud Kaiser (born 1960), Dutch footballer
• Ruud Kleinpaste (born 1952), New Zealand TV presenter
• Ruud Knol (born 1981), Dutch footballer
• Ruud Krol (born 1949), Dutch footballer
• Ruud Kuijten (born 1973), Belgian badminton player
• Ruud Lubbers (1939–2018), Dutch Prime minister
• Ruud Misdorp (born 1952), Dutch water polo player
• Ruud Stokvis (born 1943), Dutch rower
• Ruud van Nistelrooy (born 1976), Dutch footballer
• Ruud Vormer (born 1988), Dutch footballer

• Ruud Heating, Cooling & Water Heating, a division of Rheem Industries^[1]

• Rudolph (disambiguation)