Peter married Hanna Henriette Octavia Kidde Abt 1878, Danmark. Hanna (daughter of Lauritz Henriksen Kidde and Anna Frederikke Emilie Hammerich) was born 3 Jul 1854, Kobenhavn, Kobenhavn, Denmark; died 21 Oct 1924, Kobenhavn, Kobenhavn, Denmark. [Group Sheet]

1. Lykke Louise Caroline Nielsen was born 11 Nov 1880, Danmark; died 15 Apr 1966, Danmark.
2. Harriet Margrethe Nielsen was born 27 Sep 1882, Danmark; died 12 Jan 1948, Aalborg, Danmark.
3. Marie Elisabeth Nielsen was born 23 Feb 1887, Danmark; died 5 Feb 1941, Saxkøbing, Danmark.
4. Vita Johanne Nielsen was born 30 Jun 1889, Danmark; died 24 Apr 1933, Danmark.
5. Gunner Axel Henrik Nielsen was born 13 Jan 1895, Danmark; died 4 Apr 1978.