Guðjón Már Guðjónsson (born 1972), Icelandic entrepreneur; founding partner, former CEO, and board member of Industria
•
Guðjón Arnar Kristjánsson (born 1944), Icelandic MP and chairman of the Liberal Party
•
Guðjón Þórðarson (born 1955), Icelandic former footballer and manager