Onyinyechi is an Igbo name. Igbo is the name of an ethnic group in southeast Nigeria. The name Onyinyechi means God's gift and it sometimes can be seen as Onyinyechukwu. Though the name is unisex, I've met more females with this name than males.nyinyechi is an Igbo name. Igbo is the name of an ethnic group in southeast Nigeria. The name Onyinyechi means God's gift and it sometimes can be seen as Onyinyechukwu. Though the name is unisex, I've met more females with this name than males.