Jan married Neeltje Fokkes de Jong on 15 May 1890 in Utingeradeel, FR, NLD. Neeltje (daughter of Fokke Hommes de Jong and Afke Aukes van der Hoek) was born on 09 Nov 1867 in Nes, Utingeradeel, FR, NLD. [Group Sheet] [Family Chart]

1. Roelofje Jans de Boer was born on 16 Feb 1891 in Boornbergum, Smallingerland, FR, NLD.
2. Fokke Jans de Boer was born on 27 Mar 1892 in Boornbergum, Smallingerland, FR, NLD.
3. Afke Jans de Boer was born on 01 Apr 1893 in Boornbergum, Smallingerland, FR, NLD.
4. Reino Jans de Boer was born on 28 Feb 1894 in Boornbergum, Smallingerland, FR, NLD.
5. Hielkje Jans de Boer was born on 17 Apr 1895 in Boornbergum, Smallingerland, FR, NLD.
6. Attje Jans de Boer was born on 06 Apr 1896 in Smallingerland, FR, NLD; died on 14 Jul 1896 in Smallingerland, FR, NLD.
7. Attje Jans de Boer was born on 30 May 1897 in Boornbergum, Smallingerland, FR, NLD.
8. Antje Jans de Boer was born on 10 Jul 1898 in Boornbergum, Smallingerland, FR, NLD.
9. Johanna Jans de Boer was born on 27 Jul 1899 in Smallingerland, FR, NLD.
10. Jan Jans de Boer was born on 26 Jul 1901 in Smallingerland, FR, NLD.
11. Neeltje Jans de Boer was born on 26 Jul 1901 in Smallingerland, FR, NLD.
12. levenloos kind Boer was born on 17 May 1904 in Smallingerland, FR, NLD; died on 17 May 1904 in Smallingerland, FR, NLD.

Johannes married Roelofje Wiebes Lageveen. [Group Sheet] [Family Chart]