Ambassador Lugok, son of Breg, was a 23rd century Klingon male assigned to head the Klingon diplomatic delegation on Federation Starbase 47 in the Gonmog Sector. Lugok had a thick paunch and, like many Klingons, a swarthy face. (VAN novel: Harbinger)

In 2267, Lugok joined his Federation counterpart from Vanguard, Ambassador Jetanien, on Nimbus III for multilateral talks with Senator D'Tran of the Romulan Star Empire. (VAN novel: Precipice)