- Kahless
- Kor
- Koloth
- Kang
- Gorkon
- Grilka
- Worf
- Gowron
- Martok
- B'Etor
- Lursa
- K'Ehleyr (Half Human)
- Alexander Rozhenko (Half Human)
- B'Elanna Torres (Half Human)
- Lura Thok (Half Jem'Hadar)
- Varied from dark red to lightish pink
- Ridges on their nose & forehead which continued over the skull
- Two sharp fangs with crooked or sharpened teeth
- Multiple redundancies in their organs
- Pregnancies ran thirty weeks
- Physically stronger than most humanoids
- Qo'noS (Util 3069)
- Faan Alpha
- Warrior race, who value honor & combat
- Society was based around Great Houses of noble lineage
- Tradition was an essential part of their lives
- Had rituals for almost everything
- Kahless was a legendary mytho-civtorical Klingon figure; he founded the Empire
- 2154: Used Augment DNA to enhance themselves, unleashing a mutagenic airborne plague across the Empire
- All infected, were changed, they lost their ridges & looked more Human, became hereditary
- 2256-2257: Klingon-Federation War occurs, ends with a peace accord in Paris
- 2267: Sign the Treaty of Organia, establishing a delicate peace with the Federation
- By 2270, a cure was found for the mutation, restoring all their features
- 2293: Praxis explodes, the Khitomer Accords treaty with the Federation is signed
- 2344: Enterprise-C is destroyed defending Narendra III, cementing the Alliance
- 2346: Romulans commit the Khitomer Massacre, killing almost all of the colonists
- 2367-2368: Klingon Civil War between Chancellor Gowron & the House of Duras
- 2372: Invade the Cardassian Union, withdraw from the Khitomer Accords
- 2373: Reinstated the Khitomer Accords due to the Dominion threat
- 2373-2375: Aligned with the Federation & Romulans during the Dominion War
- 3069: The Burn caused dilithium reactors to explode, rendering Qo'noS uninhabitable
- Billions of Klingons died, reduced to eight Great Houses, left on the brink of extinction
- They ended their relationship with the Federation, not wanting to accept charity
- 3195: Starfleet & General Obel staged a battle for control of Faan Alpha;
- Allowing the Klingons to claim a new homeworld as the spoils of war
- Kotar & Shelka, the first Klingons, killed the gods who created them
- Fek'lhr was the Guardian of Gre'thor
