Major General Per Åke Nilsson Kellin (17 September 1903 – 31 March 1973) was a Swedish Army officer.

He served as Chief of Home Guard from 1955 to 1968 Kellin was born on 17 September 1903 in Svea Life Guards Parish (Svea Livgardes församling) in Stockholm, Sweden, as the son of captain Nils Adolf Kellin and his wife Thyra Charlotta Hermansson.

In 1952, Kellin was promoted to colonel in the Swedish Army Service Troops and in 1952 he was appointed commanding officer of the Scanian Logistic Regiment in Hässleholm.

[3] On 1 October 1955, Kellin assumed the position of Chief of Home Guard[4] and became a member of the Executive Committee of the Central Board of the National [Swedish] Rifle Clubs (Skytteförbundens överstyrelse).

Kellin married on 7 October 1930 in Frustuna, Södermanland County to Selma Birgitta (Britta) Jernbergh (born 8 August 1906 in Eskilstuna), the daughter of kronokassören JK Carl Laurentius (Lars) Jernbergh and Selma Christina Lovisa Henschen.