Mäns was born on December 11, 1867 at Kverrestad No 11 in Kverrestad parish. His parents were Per Nilsson and Ingar (Månsdotter) Nilsson. In 1868, he moved with his parents to Bollerup where they settled at Gårarp No 19.
In 1886 the family moved to Ingelstad No 51 in Östra Ingelstad. Måns left them here on September 5, 1888 to go to Göteborgs.
Måns met Emma Gustava Johansson and they had a daughter, Emmy Hildur Annie, born July 29, 1892. They married on February 24, 1895 and Emmy was legitimized. Another daughter, Ellen Augusta Sofia was born on September 9, 1895.