When Christen Nielsen was born on 29 June 1866, in Svenstrup, Års, Ålborg, Denmark, his father, Jens Christian Nielsen, was 34 and his mother, Ellen Kjerstine Christensdatter, was 28. He married Cecilie Marie Aarup on 13 April 1895. They were the parents of at least 1 son and 1 daughter. He lived in Århus, Vor Frue, Århus, Denmark for about 4 years and Århus, Denmark in 1930. He died on 12 May 1933, in Århus, Århus, Denmark, at the age of 66.