Yes, Egil Skallagrimsson is widely accepted by historians as a real historical person who lived in Iceland and Norway during the 10th century. While his life story was romanticized and dramatized in the medieval Egil's Saga (often attributed to Snorri Sturluson), the complex political rivalries, land disputes, and especially the sophisticated skaldic poetry attributed to him are treated by scholars as authentic historical artifacts of the Viking Age.