Children:
- Johann Peter Julius GREEFF was born on 25 Oct 1828 in Barmen; died on 1 Nov 1890 in Barmen.
- Ernst Hugo GREEFF was born on 26 Mar 1830 in Barmen; died on 1 Jul 1906 in Toronto, Canada.
- Emil Ernst GREEFF was born on 1 Sep 1831 in Barmen; died on 3 May 1917 in Frankfurt Am Main.
- Hermann Adolf GREEFF was born on 11 May 1833 in Barmen; died on 10 Nov 1909 in Stuttgart. Germany.
- Ewald GREEFF was born on 14 Jan 1835 in Barmen; died on 11 Mar 1918 in Barmen.
- Karl Emil GREEFF was born on 26 Aug 1836 in Barmen, Germany; died on 1 Feb 1911 in Barmen, Germany.
- Friedrich Otto GREEFF was born on 24 Aug 1838 in Barmen, Germany; died on 14 Feb 1919 in Koln-Lindenthal.
- Johann Peter GREEFF was born on 28 Feb 1841; died on 3 Jul 1866 in Koninggratz, Dussel; was buried in "...Wurde Auf Dem Friedhof Zu Problusz Mit Zwei Kameraden Beerdigt.".
- 2. Bernhard GREEFF was born on 7 Oct 1843 in Barmen, Germany; died on 4 Jan 1925 in New York, USA.
- Sophie Emilie GREEFF was born on 28 Dec 1845 in Barmen, Germany; died on 13 Jul 1921 in Benneckenstein, Harz, Germany.
- Charlotte Wilhelmine GREEFF was born on 16 Jul 1847; died on 29 Apr 1916 in Detmold.
- Clara Wilhelmine (Minchen) GREEFF was born on 2 Dec 1849; died on 16 May 1864.
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