Kayser is a surname derived from the German imperial title Kaiser (English: emperor). The title Kaiser is in turn derived from the Latin title Caesar, which again is a derivation from the personal name of a branch of the gens (clan) Julia, to which belonged Gaius Julius Caesar, the forebear of the first Roman imperial family. The further etymology is unclear. Other names with the same origin are Kaiser and Keiser; Keyser is more common as a Dutch spelling, and Qaisar is an Arabic version.
Adolph H. Kayser (1851–1925), Mayor of Madison, Wisconsin, United States
Allan Kayser (born 1963), American actor
Alois Kayser (1877–1944), German missionary
Benjamin Kayser (born 1984), French rugby player
Bernhard Kayser (1869–1954), German ophthalmologist.
Carl Gangolf Kayser (1837–1895), Austrian architect
Charles Willy Kayser (1881–1942), German film actor
Emanuel Kayser (1845–1927), German geologist
Éric Kayser (born 1964), French baker and food writer
Fredrik Kayser (1918–2009), Norwegian resistance member during World War II
Fredrik A. Kayser (1924–1968), Norwegian furniture designer
Heinrich Kayser (1853–1940), German physicist
Heinrich Ernst Kayser (1815–1888), German violin pedadogue
Leif Kayser (1919–2001), Danish composer and organist
Mark Kayser, American TV personality
Oliver Kayser (born 1973), Austrian fencer
Ralph Kayser German medical specialist in orthopedics
Renato Kayser (born 1996), Brazilian football player
Robert Kayser (1805–1877), German industrialist and banker
