Guðjón Arnar Kristjánsson (5 July 1944 – 17 March 2018) was an Icelandic politician and chairman of the Liberal Party (Frjálslyndi flokkurinn) from 2003 to 2009.

He was an active member of the Independence Party and attended meetings of Althingi 8 times in 1991–1995.

In 1999 he joined Sverrir Hermannsson and formed the Liberal Party.

As such, Guðjón Arnar was commonly referred to as Addi Kitta Gau which means Addi (short for Arnar) son of Kitti Gau.

[3][4][5] Guðjón Arnar died on 17 March 2018 in the National University Hospital of Iceland after a battle with cancer.