Huygens (also Huijgens, Huigens, Huijgen/Huygen, or Huigen) is a Dutch patronymic surname, meaning "son of Hugo". Most references to "Huygens" are to the polymath Christiaan Huygens. Notable people with the surname include:
Jan Huygen (1563–1611), Dutch voyager and historian
Constantijn Huygens (1596–1687), Dutch poet, diplomat, scholar and composer
Constantijn Huygens, Jr. (1628–1697), Dutch statesman, soldier, and telescope maker, son of Constantijn Huygens
Christiaan Huygens (1629–1695), Dutch mathematician, physicist and astronomer, son of Constantijn Huygens
Lodewijck Huygens (1631–1699), Dutch diplomat, the third son of Constantijn Huygens
Cornélie Huygens (1848–1902), Dutch writer, social democrat and feminist
Léon Huygens (1876–1918), Belgian painter
Jan Huijgen (1888–1964), Dutch speedwalker
Christiaan Huijgens (1897–1963), Dutch long-distance runner
Wil Huygen (1922–2009), Dutch children's and fantasy writer, e.g. of Gnomes