 Since the turn of the 21st century genealogy tracing by means of DNA testing is in part revealing the Igbo ancestry of African Americans, some notable celebrities including Blair Underwood, Quincy Jones, and Nnedi Okorafor.The Igbo were affected heavily by the Atlantic slave trade in the 18th century.Enslaved Igbo were known for being rebellious and having a high count of suicide in defiance of slavery.