Groos is a German surname, a variant of Groß, from Old High German groz meaning "tall, big." It typically originated as a nickname for a large or stout person.Notable BearersArthur Groos (born 1943), American philologist, musicologist, medievalist and GermanistDavid Groos (1918–1976), Canadian politicianFriedrich Groos (1768–1852), German physician and philosopherKaare Steel Groos (1917–1994), Norwegian politicianKarl Groos (1861–1946), German psychologistMargaret Groos (born 1959), American athleteRichard Groos (died 1407), English politicianWilhelm Gisbert Groos (1894–1997), German World War I flying aceCultural SignificanceThe name is also associated with places named Groos, Michigan, and historic houses in Texas.Meaning: tall, bigOrigin: GermanType: SurnameUsage Regions: Germany, United States