Mumu people everywhere you are develop another people land all over the place and you call yourself richest people when your own father mother's land is ghost town .
You need to correct yourself immediately. Ikwerres are Igbo. Igbo is a nation of different dialects found in South East, South South, North Central geo-political zones in Nigeria. All the names of Ikwerre sons and daughters you mentioned, are all Igbo. The history of Ikwerre did not start after the war. Nigeria government cannot apportion ancestry or ethnicity by dividing the Igbos through state creation for political reasons. My wife is from Ikwerre and a full blooded Igbo woman. Stop distracting people with the propaganda from those paid political jobbers disgracing their ancestors.
Nigeria is made up of nations and not tribes. The word tribe is English language that denotes primitive stage of human evolution and development. Look up the meaning of the word Tribe in English dictionary. Be informed that 70% of the so called rich people in Nigeria are treasury looters.
Realistically speaking, for every one dollar in Yorubaland, there are 4 to 5 dollars in Igboland. Yorubas don't even come a close second to Igbos, when it comes to riches.
You need to read history, get informed for good. Stop reacting to issues with emotions and hate. Facts are important for historical context. The Biafran war was a genocide. Facts.