This is an Icelandic name
. The last name is a patronymic or matronymic, not a family name
; this person is properly referred to by the given name "Eiður Svanberg Guðnason".
Eiður Svanberg Guðnason (7 November 1939 – 30 January 2017) was an Icelandic politician and diplomat. He served as Ambassador of Iceland to Australia from 28 November 2003 until 22 February 2007. He was born in Reykjavík.
Eiður died on 30 January 2017 in Garðabær at the age of 77.