Manan'Agar was a Jem'Hadar.
In 2371, Manan'Agar was aboard a Jem'Hadar space station that was attacked by the Unclean. Although he was killed and his consciousness absorbed, Manan'Agar was able to give the crew of the USS Defiant the destruct codes of the space station. (DS9 - Invasion! novel: Time's Enemy)