DaqS, son of Kang (alternately Dax, son of Kang) was a Klingon male who was born in 2291. He was the first child of the noted Klingon warrior Kang and his wife Mara, and was named in honor of Kang's Trill friend Curzon Dax - who was named the godfather of DaqS.
DaqS was murdered by the Albino in retaliation for the role that Kang had played in trying to bring the Albino to justice. The first born sons of Kor and Koloth were also killed by the Albino, and Captain Hikaru Sulu's daughter Demora Sulu became seriously ill due to the Albino's underhanded attacks.
After the death of DaqS and the other Klingon children, his father, Kor, Koloth, and Curzon Dax all swore a blood oath to cut out the heart of the Albino and eat it while he watched. It would not be until 2370 that the blood oath was finally fulfilled by the three Klingons and Jadzia Dax, with Kang delivering the death blow. (DS9 episode: "Blood Oath"; TLE novel: Excelsior: Forged in Fire)