Seyfert is a surname, and may refer to: Carl Keenan Seyfert (1911–1960), United States astronomer Gabriele Seyfert (born 1948), German athlete in figure skating J. Michael Seyfert (born 1959), German Mexican documentary filmmaker, photographer Johann Caspar Seyfert (1697–1767), German music composer (1731–1772), German music composer, son of Johann Caspar Seyfert R. Tracy Seyfert (born 1941), United States political figure from Pennsylvania Other uses Seyfert (crater), a crater on the far side of Earth's Moon that is named after Carl Keenan Seyfert Seyfert Galaxy, a class of galaxies named after Carl Keenan Seyfert Seyfert's Sextet, a group of galaxies located in a cluster some 190 million light-years from Earth See also Seifert, surname Seiffert, surname Siefert, surname