On 12 Dec 1846 when Roelof was 46, he first married Freerkien Jans Potze, daughter of Jan Hinderiks Potze (8 Jan 1747-21 Jan 1809) & Antje Freerks Veldhuis (ca 1764-24 Apr 1834), in Emmen, Drenthe. Born on 13 Jul 1800 in Vlagtwedde, Groningen. Freerkien Jans died in Roswinkel (Emmen), Drenthe, on 22 Dec 1881; she was 81.

On 19 May 1820 when Roelof was 20, he second married Marchijn Willems Kamping (61404) , daughter of Willem Freerks Kamping (15 Feb 1761-13 Dec 1826) & Zwaantijn Harms Steen (51690) (ca May 1766-10 Feb 1852), in Emmen, Drenthe.538 Born on 5 May 1796 in Roswinkel (Emmen), Drenthe.538 Marchijn Willems died in Roswinkel (Emmen), Drenthe, on 3 Mar 1843; she was 46.538

Children of Roelof Bults and Marchijn Willems Kamping, born at Roswinkel:
    i. Willem Bults, b. 5 Nov 1820, d. 4 May 1882 at Roswinkel, m. 1st at Emmen 26 Sep 1843 Annegien Elling (b. 25 Jul 1820 at Roswinkel, d. there 6 Mar 1873, dau. of Willem Elling & Annegien Jans de Jonge), m. 2nd at Emmen 24 Dec 1874 Marchen Veltrop (b. 5 Dec 1830 at Roswinkel, d. 4 May 1918 at Emmen, dau. of Jan Veltrop & Aaltien Mewes);
    ii. Arend Bults, b. 11 Oct 1823, d. 15 Oct 1823;
    iii. Arend Bults, b. 4 Jul 1825, d. 27 Apr 1888 at Vastenow (Emmen), m. at Emmen 13 Sep 1850 Annegien Elling (b. 7 Oct 1821 at Roswinkel 7 oktober 1821, d. 10 Feb 1887 at Vastenow (dau. of Everwijn Elling & Hillegien Wilts);
    iv. Harm Bults, b. 4 May 1828, d. 16 Nov 1829;
    v. Zwaantien Bults, b. 26 Dec 1830, d. 22 Mar 1888 at Noord Sleen, m. at Sleen 13 Jul 1860 Geert Zwols (b. 6 Feb 1829 at Sleen, d. there 27 Aug 1829, dau. of Geert Lukas Zwols & Hillechien Geerts); and
    vi. Lambert Bults, b. 8 Aug 1835, d. 7 May 1916 at Exloerveen, m. at Odoorn 2 Jun 1863 Jantien Oosting (b. 10 Oct 1835 at Odoorn, d. 27 Oct 1913 at Exlorveen, dau. of Lukas Oosting & Jantien Jans Hoving).