Ankan'igar was a Jem'Hadar First in the mirror universe.
When Ankan'igar met with Taran'atar, he was known as Second, in deference to Taran'atar's honored elder status. In 2386, Taran'atar launched a mission to seize Julian Bashir from the Galactic Commonwealth's Enterprise for killing Odo years earlier. (ST - Section 31 novel: Disavowed)