Roelof married Strijntje Kroon on 27 November 1879 in Sappemeer, Groningen, Nederland. Strijntje (daughter of Thies Kroon and Trijntje Diephuis) was born on 04 February 1861 in Sappemeer, Groningen, Nederland; died on 06 September 1912 in Achterdiep, Sappemeer, Groningen, Nederland. [Group Sheet] [Family Chart]

1. Trijntje Jansen was born on 28 March 1880 in Sappemeer, Groningen, Nederland; died in Date unknown.
2. Jan Jansen was born on 18 October 1881 in Sappemeer, Groningen, Nederland; died in Date unknown; was buried in Sappemeer, Groningen, Nederland.
3. Thies Jansen was born on 31 January 1883 in Sappemeer, Groningen, Nederland; died in Date unknown.
4. Jakob Jansen was born on 09 June 1885 in Achterdiep, Sappemeer, Groningen, Nederland; died in Date unknown.
5. Johannes Jansen was born on 02 February 1887 in Achterdiep, Sappemeer, Groningen, Nederland; died in Date unknown; was buried in Noordbroek, Groningen, Nederland.
6. Hillechien Jansen was born on 17 December 1888 in Achterdiep, Sappemeer, Groningen, Nederland; died on 08 September 1950 in Groningen, Groningen, Nederland.
7. Grietje Harmanna Jansen was born on 02 October 1890 in Achterdiep, Sappemeer, Groningen, Nederland; died on 17 January 1912 in Sappemeer, Groningen, Nederland.
8. Harmanna Jansen was born on 20 April 1893 in Achterdiep, Sappemeer, Groningen, Nederland; died on 05 April 1949 in Hoogezand-Sappemeer, Groningen, Nederland.
9. Albertus Jansen was born on 27 February 1895 in Achterdiep, Sappemeer, Groningen, Nederland; died in Date unknown.
10. Albert Jansen was born on 27 February 1895 in Achterdiep, Sappemeer, Groningen, Nederland; died on 27 May 1895 in Achterdiep, Sappemeer, Groningen, Nederland.
11. Albertje Jansen was born on 20 January 1897 in Achterdiep, Sappemeer, Groningen, Nederland; died on 31 August 1910 in Achterdiep, Sappemeer, Groningen, Nederland.
12. Lukkiena Jansen was born on 28 December 1899 in Achterdiep, Sappemeer, Groningen, Nederland; died in Date unknown; was buried in Sappemeer, Groningen, Nederland.
13. Geert Jansen was born on 09 March 1901 in Achterdiep, Sappemeer, Groningen, Nederland; died in Date unknown; was buried in Sappemeer, Groningen, Nederland.
14. Koenraad Jansen was born on 09 March 1901 in Achterdiep, Sappemeer, Groningen, Nederland; died in Date unknown.
15. Roelof Jansen was born on 27 January 1903 in Achterdiep, Sappemeer, Groningen, Nederland; died in Date unknown; was buried in Wagenborgen, Termunten, Groningen, Nederland.