Knut Hamsun's second wife was Marie Andersen (b. 19.11.1881, d. 5.8.1969). Marie and Knut Hamsun married on 25.6.1909. They had four children.

Knut Hamsun's first wife: Bergljot Bassøe Beck (b. 17.4.1873, d. 13.4.1943) (Married to Edoard Göpfert 31.12.1893, divorced 1898. Bergljot Bassøe Beck Göpfert had his first child, Maria, called Vesla, with Edoard Göpfert on 29.7.1894.)

Knut Hamsun's siblings numbered seven people.

Knut Hamsun's mother Tora Olsen (b. 11.1.1830, d. 6.1.1919) had two brothers, Ole and Hans, who were central to Knut Hamsun's life.

Ole Pedersen's daughter Anna (Knut Hamsun's cousin) was number 8 in a line of 11 siblings. She was born in 1859 – the same year as Knut Hamsun. She moved to Hønefoss in 1884 and emigrated to the USA in 1887.

Nut Hamsun married for the first time on 16.5.1898 to Bergljot Bassøe Beck (b. 17.4.1873, d. 13.4.1943). They were divorced on 20.4.1906. They had one daughter: Victoria Hamsun (b. 15.8.1902, d. 1980)