Abiriba: Where in-laws and nwadi-anas (mother’s family) inherit properties (200 years and counting) Abiriba people operate a unique system of lineage: the Ikwu-nne (mother’s lineage), the Ikwu-nna (father’s lineage) and the Ogo (in-law) Interesting read. Related By OzoIgboNdu1 of Igbo Defender I am an Igbo prince. Onye Igbo ka m bu! View all of OzoIgboNdu1 of Igbo Defender's posts.