Eze (pronounced [ézè]) is an Igbo word which means King. Such words as Igwe and Obi plus others are used by Igbo people as titles of respect and homage to the Eze. Igwe is derived from the Igbo word Igwekala or Eluigwekala, "the sky or heaven above the sky is higher or bigger than land", implying that the Eze is a higher servant of the people. Obi is normally the centre building for receiving visitors in an Igbo leader's or man's homestead; and when used as a title of respect for the Eze, Obi implies: "the one who sits in the throne house or heart of the Kingdom."
In Igbo tradition and culture, the Eze is normally an absolute monarch advised by a council of chiefs or elders whom he appoints based on their good standing within the community. A popular saying in Igbo is "Igbo enwe eze", which translates to "the Igbo have no king." This popular saying does not, however, capture the complexity of Igbo societies as portrayed in many centuries of anthropological, sociological and political research.
The Igbo people had and still have ruling bodies of royal and political leaders where an individual can be recognized by the entire society as primus inter pares, i.e., first among equals. This status is usually hereditary and among the male lineage since Igbo culture is patrilineal. Women in Igbo cultures were known to develop parallel social hierarchies through which they both competed and collaborated with their counterpart male kingship and governing hierarchies.
Scholars generally believe that Igbo kingship institutions originated from three sources. The first source is indigenous and ancient priesthood, which traditionally combined clerical and political duties in the village-based republics. This is the case in several places, notably in Ngwa - where Josaiah Ndubuisi Wachuku was Eze and paramount chief during British colonial times. Ezes also existed in Arochukwu, Awka, Nri-Igbo, Owere and Northern Nsukka. Enugu-Ezike, Ovoko, and Iheakpu-Awka are home to the Igbo-Eze communities. The King is variously referred to as Eze or Ezedike, depending on lineage.