Þórður kakali Sighvatsson
Þórður kakali Sighvatsson (c.1210-56) (the nickname kakali probably means "The Stammerer", although Cleasby-Vigfússon and Elizabeth Ashman-Rowe translate it as “the Claypot”) was a 13th-century Icelandic chieftain during the Age of the Sturlungs.