Murdoh /'mʊrdə/ (pl. Murdon) is a tarnarian political title, designated to a non-elected public official with the power to run a non-sovereign level of government, typically a city or a region of a state. Appointed by the head of state, it is usually the second-powerful rank in a country.

Originated in Toor, the rank was used in many of the northern countries, such as Afanyu, Loodon Empire and Xornerian, and continues to be used even more widely today.

Murdoh means “the knowledgeable one” or, more accurately, “the one possessing knowledge” in Bukk.

All country Murdon may form the Murdon Circle, a group that is especially loyal to the country's ruler. This is not always the case, but if the Murdon Circle is established, that means that the monarch's power is no longer absolute. Such monarchy is designated as “circled monarchy”, and a number of key decisions, such as declaring war, can be made only with the support of the Murdon Circle.

The Murdon Circle is frequently established by the monarch, but Murdon can decide to form a Murdon Circle themselves. In this case the monarch typically has no choice, but to accept it, since opposing the Murdon Circle effectively means opposing every single region's governor. At the same time, the formation of the Murdon Circle, while might be viewed as a lack of trust in the monarch, is usually an attempt to hold the monarch's rule together and strengthen it, as each Murdoh's power is usually tightly connected to that of the monarch. Historically, Murdon Circles initiated by Murdon rarely result in the usurpation of the dynasty.