XVo. Cornelis Geertruyus Kolff, born Rotterdam 12 May 1846, merchant at Buitenzorg, deceased Soekaboemi 7 Oct. 1912, married 1st Buitenzorg 28 March 1888 Jacoba Jonker, born Buitenzorg 2 Nov. 1841, deceased there 8 May 1888, daughter of Jan Jacob and N.N. and wid. of Hendrik Orth; married 2nd Lebak (Bantam) 9 Feb. 1889 Anna Jonker, born Buitenzorg 24 July 1843, deceased Soekaboemi 25 June 1911, sister of his 1st spouse and wid. of Hendrik Adrian Ludwig von Michalofski.
From the first marriage:

XVIq. Jacques Johan Cornelis Kolff, born Buitenzorg 19 Nov. 1881, directeur Cultuurmij. Pasir Geding there, deceased Lembang 26 Dec. 1931, married Buitenzorg 10 Aug. 1906 Anna Cornelia Francina Schock, born Manggar (Billiton) 9 Aug. 1888, deceased Driebergen-Rijsenburg 8 Aug. 1959, daughter of Rijk Johannes and Francina Margaretha Brugman; she remarried Bandoeng 1 Apr. 1938 Karl Cornelis Wilhelm Schmidt.
They adopted:

XVIIq. Wally Paul (Willem) Kolff (change of name Walle in Kolff, Gouv. Besl. 4 July 1931), born Batavia 20 Apr. 1925, oud-verzekeringsdeskundige, deceased Waalwijk 30 March 1999, married Amsterdam 12 Oct. 1948 Theresia Imelda de Boer (R.O.N.) (L.O.N.), born Willemstad (Curaçao) 27 May 1928, daughter of Johannes and Anna Maria Boermans.
From this marriage:
Anna Maria Kolff (L.O.N.), born Amsterdam 24 Sept. 1948, schoonheidspecialiste, married Waalwijk 24 Sept. 1975 Johannes Hendricus Maria van der Marel (L.O.N.), born Voorburg 23 Apr. 1949, drukker, son of Johannes and Maria Theodora van der Meer.

XVp. Hendrik Franciscus Kolff, born Rotterdam 8 Aug. 1848, member firma Tollens & Co., vernis- and verffabrikanten (Links: Connection), deceased Rotterdam 12 Oct. 1903, married Rotterdam 5 Sept. 1872 Maria Martina Ruijchaver, born Rotterdam 9 Sept. 1846, deceased there 20 Dec. 1912, dr. van Martinus Jan and Maria Sophia Martha Bonga.
From this marriage:
1. Cornelis Laurentius Kolff, born Rotterdam 18 Aug. 1873, deceased there 9 Apr. 1874.
2. Cornelis Laurentius, follows XVIr.
3. Martinus Jan, follows XVIs.

XVIr. Cornelis Laurentius Kolff (1st Heerendiner) (Report 1st Heerendiner), born Rotterdam 1 Oct. 1874, member firma Tollens & Co., vernis- and verffabrikanten there (Links: Connection), deceased The Hague 26 May 1951, married Dordrecht 10 Aug. 1898 Dina Cornelia van der Elst, born Dordrecht 25 Jan. 1877, deceased Hilversum 19 Nov. 1958, daughter of Dr. Bartholomeus and Jeannette Dorothée den Bandt.
From this marriage:
1. Maria Martina Kolff, born Rotterdam 7 Aug. 1900, deceased Soest 1 Oct. 1984, married 1st The Hague 14 Oct. 1920 (echtsch. ingeschr. there 26 May 1951), Barend Hopperus Buma, born Leeuwarden 5 Aug. 1896, wijnbouwer in Chopak aan het Balatonmeer (Hongarije) 1921-1928, directeur N.V. De Zilvervos, pelsdierfokkerij landgoed Refugium at Elspeet 1929-1932, burgemeester van Doniawerstal 1934-1940, van Haskerland 1940-1941, van Smallingerland 1941-1955, res.-1e luitenant cav., deceased Drachten 29 Apr. 1958, zn. van Wiardus Willem and Petronella Johanna Alberta Dieuwerdina ter Haar; he remarried The Hague 7 Dec. 1946 (div. reg. there 7 Sept. 1950) Catharina van Haersma Buma.
2. Bartholomeus Kolff, born Rotterdam 27 Apr. 1902, deceased Zürich 31 July 1921.
3. Hendrik Franciscus, follows XVIIr.
4. Sophia Maria Kolff, born Rotterdam 8 Nov. 1914, deceased Amersfoort 31 March 1995, married The Hague 19 Oct. 1940 Mr. Carel Paulus Hoytema van Konijnenburg (R.O.N.), born Bergambacht 15 Feb. 1904, oud-burgemeester van Scherpenzeel, son of Pieter and Maria Louise Frijlinck and div. spouse of Gerda van Dalen.

XVIIr. Hendrik Franciscus Kolff (Board 1948-1951), born Rotterdam 15 July 1911, oud-directeur Tollens & Co. N.V., vernis- and verffabr. there (Links: Connection), deceased Wassenaar 26 Aug. 1996, married 1st Harlingen 7 Apr. 1936 (echtsch. ingeschr. there 6 Apr. 1951) Amelia Gerardina Hannema, born Harlingen 10 May 1915, deceased Wassenaar 5 July 1999, daughter of Anthony Engelbert and Anna Adriana Sophia Buma; she remarried Wassenaar 30 March 1957 Pieter Hendrik Kemper, divorced spouse of Henriëtte de Monchy; married 2nd Londen 17 May 1951 Petronella Daniëlla Beelaerts van Emmichoven, born Zierikzee 12 June 1915, deceased Wassenaar 24 Feb. 1994, daughter of Henri Everhard, heer van Emmichoven, Ganswijk and Waardhuizen, and Maria Hocke and gesch. echtg. van Ir. Cornelis Willem Gregorius van de Velde.
From the first marriage:
1. Cornelis Laurentius, follows XVIIIp.
2. Anthony Engelbert, follows XVIIIq.
3. Wouter Jacob, follows XVIIIr.

XVIIIp. Cornelis Laurentius Kolff (R.O.N.) (Member of Honour) (Board 1969-2006) (De Colve VIII) (Report 1st Heerendiner), born Wassenaar 3 May 1938, adjunct-directeur Tollens & Co. N.V., vernis- and verffabr. at Rotterdam 1965-1970 (Links: Connection), company secretary 1970-1992 and executive director (1992-2002) Ferro (Holland) B.V. Rotterdam, hoofdingeland (1985-2003) and Hoogheemraad (2003- ) Hoogheemraadschap van Schieland (1985- ), oud-res.-1e luitenant mil. adm., married Hoogezand 25 Apr. 1964 Mariette Swanette Tjaarda Reinders (Member of Honour) (Editor De Colve 1996-2012), born Groningen 7 July 1939, daughter of Dr. Hugo Tjaard Johan and Frouwke Maria Weevers Stous.
From this marriage:
1. Hendrik Franciscus Kolff, born Rotterdam 5 July 1965.
2. Mr. Franka Marina Kolff, born Rotterdam 24 July 1967, project coordinator Human Rights Education (Sarpis), married Rotterdam 31 Aug. 1991 Drs. Erik Robert d'Engelbronner, born Groningen 23 Aug. 1964, drs. geology, hydrogeoloog, son of Robert Marinus Charles and Johanna Margaretha Nierstrasz.
3. Hugo Gerhard Cornelis, follows XIXp.
4. Mr. Anthony Wouter Kolff (Board 2006- ) (Links), born Rotterdam 28 Nov. 1976, candidate notary public Loyens & Loeff, Amsterdam (2003-2010), director Studentflex Uitzendbureau (2001-2010), chairman VVD Utrecht (2007-2010), alderman Nieuwegein (2010-2012), mayor of Veenendaal (2012- ).

XIXp. Drs. Hugo Gerhard Cornelis Kolff, born Rotterdam 9 Aug. 1969, drs. economie, werkzaam Pokon & Chrysal B.V., married Groningen 11 Oct. 1996 Lokke Schuling, psychologe, born Groningen 12 januari 1971, daughter of Dr. Jan and Elisabeth Frederika Maria Foeken.
From this marriage:
1. Alle Julius Cornelis Kolff, born Naarden 21 Sept. 1999.
2. Fenna Bodine Elisabeth Kolff, born Naarden 21 Sept. 1999 (twin with previous).
3. Sybe Jan Leo Kolff, born Naarden 11 Dec. 2001.

XVIIIq. Anthony Engelbert Kolff, born Wassenaar 19 July 1942, EDI-Executive Europe Combined Terminals B.V. Rotterdam, married Rotterdam 30 Oct. 1969 Wilmina Aleida Willinge, born Rotterdam 6 Feb. 1943, oud-jeugd maatschappelijk werkster, daughter of Mr. Johan Anton and Ida Elisabeth Westra van Holthe.
From this marriage:
1. Johan Anton Kolff, follows XIXq.
2. Lukas Jeroen Kolff, born Rotterdam 8 Oct. 1973 (&).

XIXq. Johan Anton Kolff, born Rotterdam 11 Sept. 1970, married Bloemendaal 16 June 2001 Saskia Marchine Johanna van Es, daughter of Johannes Jacobus and Hermine Marchine Smuling, born Amsterdam 8 July 1972.
From this marriage:
1. Hein Lukas Kolff, born Amsterdam 30 Aug. 2005
2. Wick Johannes Kolff, born Prague (Czech Rep.) 24 Apr. 2007
3. Aleid Antonia Kolff, born Prague (Czech Rep.) 24 Apr. 2007.

XVIIIr. Drs. Wouter Jacob Kolff (Board 1971-1986), born Wassenaar 23 July 1945, econ.drs., directeur Rabobank Nederland (lid directiecominté centraal bankbedrijf), married Haarlem 14 March 1970 Jkvr. Anna Cuinira van Valkenburg, born Amstelveen 26 Jan. 1947, daughter of Jhr. Mr. Cornelis Constantijn and Jkvr. Wilhelmine Justine Nahuys.
From this marriage:
1. Amélie Geraldine Kolff, born Rotterdam 13 March 1971, married Haarlem 18 May (kerkelijk Wassenaar 19 mei) 2001 Bastiaan André van de Bunt, born .., son of (..) van de Bunt and (..) van der Meulen.
2. Feyo Anthony Kolff, follows XIXr.
3. Wendeline Justine Kolff, born Rotterdam 26 July 1976, married Wassenaar 26 July 2008 Jeroen (H.H.F.) van de Ven, born .., son of (..) van de Ven and (..).
4. Barbara Madeleine Kolff, twin with previous, born Rotterdam 26 July 1976 married Wassenaar 5 Febr. 2011 Luuk Pijnaker, born .., son of (..) Pijnaker (..).

XIXr. Feyo Anthony Kolff, born Rotterdam 16 Jan. 1973, jurist, employed with European Broadcasting Union, Geneva, married The Hague 14 Oct. 2000, Mijke Hertoghs, daughter of Paul and Ine Wynans, born Maastricht 24 Jan. 1973, employed with United Nations.
From this marriage:
1. Casper Calvin, born Geneva (Switzerland) 12 Febr. 2008.
2. Victor Jacob, born Geneva (Switzerland) 9 May 2011.

XVIs. Martinus Jan Kolff (Board 1926-deceased) (1st Heerendiner), born Rotterdam 9 Jan. 1878, member firma Kolff & Van der Hoeven, deceased there 25 Sept. 1927, married Rheden 25 Sept. 1902 (div. reg. The Hague 17 Dec. 1925) Evelina van Stolk, born Rotterdam 5 Sept. 1878, deceased The Hague 16 Jan. 1974, daughter of Cornelis and Eveline Gesine Heufke Kantelaar.
From this marriage:
1. Hendrik Franciscus, follows XVIIs.
2. Eveline Kolff, born Rotterdam 28 Apr. 1906, deceased Laren 23 februari 2001, married The Hague 9 March 1932 Jhr. Hans van Suchtelen, born Blaricum 13 Nov. 1907, Diplom-Ing., oud-gieterijingenieur, son of Jhr. Dr. Nicolaas and Carolina Jacoba van Hoogstraten.
3. Wilhelmina Kolff, born Rotterdam 29 July 1908, garden architect, deceased The Hague 30 Nov. 2001, married The Hague 27 Apr. 1940 Gerard Johannes van Buuren (R.O.N.) (Biographies 1939-1950), born Oegstgeest 27 May 1900, officier inf., laatst. kolonel, garnizoenscommandant van Den Haag, deceased there 30 Jan. 1975, son of Johan Dirk and Adriana Kort.

XVIIs. Hendrik Franciscus Kolff, born Rotterdam 9 July 1904, publisher South African Newsletter, deceased Lesotho 19 Sept. 1983, married 1st (divorce reg. Johannesburg 1969) Betty Iworth; married 2nd Maseru (Lesotho) Thelma Francina Mphako, born Kolojane (Lesotho) 12 Sept. 1926, former-teacher and secretary, daughter of Joel Tsiekholo and Mapitiri Moremppholo.
They adopted:
Cordelia Ndo Kolff, born Maseru 12 Aug. 1969.