The cornet was a part of early klezmer bands. It is a very flexible instrument in a klezmer band, playing lead, counter-lines and rhythmic licks.
Klezmer cornet players in the late 19th and earlier 20th centuries included:
USA Alex Fidel, Joseph Hoffman
Klezmer cornet players in the later 20th century and today include:
USA Jordan Hirsch (also trumpet)