IGBO: what you need to know
Igbo is the language spoken in Ala Igbo or Ani Igbo (Igboland) by the people who are collectively referred to as "Ndi Igbo";
Igbo is not a person's name neither a name of ancestor rather, it is a language. Just as English is related to the people of "England" so as Igbo is related to the people of "Igboland".
Before European colonialism, the Igbo-speaking peoples, who shared similarities in culture, lived in localized communities and were not unified under a single cultural identity or political framework, although unifying processes were present via expansion, ritual subordination, intermarriage, trade, cultural exchange, migration, war, and conquest.
Villages and village groups were generally identified by distinct names of their ancestral founders or by specific names such as Umuleri, Nri, Ogidi, Nnobi, Orlu, Ngwa, Ezza, and Ohaffia.
There are several theories concerning the etymology of the word "Igbo" (wrongly spelled "Ibo" by British colonialists). Eighteenth-century texts had the word as "Heebo" or "Eboe," which was thought to be a corruption of "Hebrew." "Igbo" is commonly presumed to mean "the people." The root -bo is judged to be of Sudanic origin; some scholars think that the word is derived from the verb gboo and therefore has connotations of "to protect," "to shelter," or "to prevent"—hence the notion of a protected people or a community of peace. Keep following Kwado Ezza for more inspiring stories
Igbo-speaking peoples can be divided into five geographically based subcultures: northern Igbo, southern Igbo, western Igbo, eastern Igbo, and northeastern Igbo. Each of these five can be further divided into subgroups based on specific locations and names. The northern or Onitsha Igbo are divided into the Nri-Awka of Onitsha and Awka; the Enugu of Nsukka, Udì, Awgu, and Okigwe; and those of the Onitsha town.
The southern or Owerri Igbo are divided into the Isu-Ama of Okigwe, Orlu, and Owerri; the Oratta-Ikwerri of Owerri and Ahoada; the Ohuhu-Ngwa of Aba and Bende; and the Isu-Item of Bende and Okigwe. The western Igbo (Ndi Anioma, as they like to call themselves) are divided into the northern Ika of Ogwashi Uku and Agbor; the southern Ika or Kwale of Kwale; and the Riverrain of Ogwashi Uku, Onitsha, Owerri, and Ahoada.
The eastern or Cross River Igbo are divided into the Ada (or Edda) of Afikpo, the Abam-Ohaffia of Bende and Okigwe, and the Aro of Aro. The northeastern Igbo include the Ogu Uku of Abakaliki (Ezza, Izzi and Ikwo) and Afikpo.
—Apotheosis of knowledge