He marries Finnine, the sister of Ferdoman, but mistreats her (in one version he kills her). Ferdoman duels Conán over the offense, and both men die in the fight.
He married Finnine, Ferdoman’s sister, yet mistreated her (in some versions she was killed). Ferdoman challenged Conán to a duel for this wrongdoings, and both perished during their confrontation.