When Niels Christian Thomasen was born on 7 October 1860, in Otting, Skivehus, Denmark, his father, Thomas Laustsen, was 47 and his mother, Inger Nielsdatter, was 32. He married Maren Christensen on 17 April 1894, in Oddense, Skivehus, Denmark. They were the parents of at least 2 sons and 2 daughters. He lived in Oddense, Hindborg, Viborg, Denmark in 1911. He died on 30 May 1933, in Trustrup, Dølby, Skivehus, Denmark, at the age of 72, and was buried in Oddense, Oddense, Hindborg, Viborg, Denmark.