Kristján Jónsson was Prime Minister

Prime Minister of Iceland

The Prime Minister of Iceland is Iceland's head of government. The prime minister is appointed formally by the President and exercises executive authority along with the cabinet subject to parliamentary support....

 of Iceland

Iceland

Iceland , described as the Republic of Iceland, is a Nordic and European island country in the North Atlantic Ocean, on the Mid-Atlantic Ridge. Iceland also refers to the main island of the country, which contains almost all the population and almost all the land area. The country has a population...

 from 14 March 1911 to 24 July 1912.
He was member of Althing

Althing

The Alþingi, anglicised variously as Althing or Althingi, is the national parliament of Iceland. The Althingi is the oldest parliamentary institution in the world still extant...

i 1893 to 1905 and from 1908 to 1913.

He was born on the farm Gautlönd in North East Iceland and two of his brothers became politicians, Pétur (28 August 1858 – 20 January 1922, member of Althingi 1894–1922, minister of Industrial Affairs 1920–1922) and Steingrímur (27 December 1867 – 29 December 1956, member of Althingi 1906–1915). Kristján was the father in law of Sigurður Eggerz

Sigurður Eggerz

Sigurður Eggerz was Prime Minister of Iceland from 21 July 1914 to 4 May 1915, and from 7 March 1922 to 22 March 1924.-Career:...

, who later took office as prime minister.