Oordar clan (bukkean: Urdor) was a family that came to power in Heran and for several generations ruled many regions, later founding Tref.

Oordar clan is especially famous for being part of a causal loop, initiated by the superhero warrior Farnole.

• Kren Oordar, founder of the clan
• Maksag Oordar, his close friend, known to the outside world as his brother
• Katsag, Maksag's eldest son
• Maye Seaoor, Maksag's first wife
• Kren the Younger, Kren's son
• Gorona Oordar, Nilma's wife
• Rodare Oordar, who is also Kren Oordar
• Nilma Oordar, Maksag's son, later known as the Angry King
• Pherro Oordar, Kren's second son
• Hee Oordar, founder of Tref, King of Kings of Tref
• Iar Oordar, founder of Tref

Oordars came to power in 1513 SR, when Kren Oordar conquered Tonaran, which at the time was so powerful so as to be considered invincible. This made Kren a legend overnight. This feat, as well as Kren's knowledge of the future, allowed Maksag Oordar to expand Oordar's influence to the south and then to the east, culminating in the subjugation of Mantar.

The death of Kren the Younger, the vanishing of Rodare and the exodus of Hee, Iar and Pherro from Tarnaria in the end of the 16th CSR significantly undercut Oordar clan's influence, and one by one the Oordars in the east lost power, first in Maird, then in Tonaran, Or and Ernele and later Qep. Oordar rule in Mantar ended with the death of Nilma Oordar.

Willing to restore the family name, Hee built the city of Oordar in Tref and made it the capital, but died just several years later, ending the reign of Oordars in the west.

Kren Oordar founded what was essentially the first proto-empire of Tarnaria. This set the stage for further centralization of what was historically a very decentralized political landscape. Lafits, who were usually governors of regions of city-states, were now able to acquire significant scope and power due to the amount of Oordar expansion and the inability of the clan to provide enough family members to rule it all. At the same time, the failure of Kren the Younger to use the momentum of Oordar's influence to centralize the clan's power in Tonaran led to the Oordar proto-empire fall apart almost immediately after Kren the Younger's demise.

Kren's reliance on slave trade and the subsequent invasion and subjugation of Mantar moved slavery to the forefront of Heran economies, possibly reversing the limited social progress advocated by Mantar. In fact, Tonaran, Ernele and Or moved towards less strict laws on slavery, in some cases putting slaves in a better position than peasants, but, partially as punishment for its previous views on slave trade, Mantar turned into a center of slave trade the next 200 years, and became known for its harsh conditions and draconian laws on slavery.

Nilma Oordar, known as the Angry King, increased the role of Xaewoon Blue in politics. His persecution of Foft led to its followers being driven out of Tarnaria. As a result, Foft followers mostly exist outside of Tarnaria to this day.