Qeyhnor was a 24th century male Klingon military officer in the Klingon-Cardassian Alliance in the mirror universe.
In 2375, Qeyhnor served on the IKS Ya'Vang under the command of Kurn. (DS9 - Mirror Universe novel: Saturn's Children)
Qeyhnor continued to serve on the Ya'Vang after Kurn was killed in an attack on Terok Nor and Krona took command of the Ya'Vang. (ST - Mirror Universe novel: Rise Like Lions)