Lukara
From Memory Alpha, the free Star Trek reference
Lukara was a Klingon woman who lived in ancient times, the great love of Kahless the Unforgettable. Kahless and the Lady Lukara were married in the Great Hall of the village of Qam-Chee, which moments later was stormed by 500 of Molor's troops. The two of them were nearly killed, but vanquished their foes and thus began "the greatest romance in Klingon history". (DS9: "Looking for par'Mach in All the Wrong Places", "You Are Cordially Invited")
In DS9: "Looking for par'Mach in All the Wrong Places" taking place in 2373, Worf enthusiastically mentions the events in Qam-Chee to have happened "a thousand years ago". However, this would state somewhat of a contradiction as TNG: "Rightful Heir" and TNG: "Firstborn" both state, that Lukara and Kahless lived 500 years earlier.
Kahless once used his bat'leth to carve a statue of Lukara. (DS9: "The Sword of Kahless")
