Baron Constantijn Willem Ferdinand Mackay
       Born 31 December 1870 Amerongen 
       Died 5 February 1955 Aerdenhout 
       Married (1) 30 September 1898 Zeist 
       Jkvr. Petronella Adamina Hoeufft, daughter of Jhr. David 
       Hoeufft and Jkvr. Adelaide van de Spiegel 
       Born 24 November 1872 Haarlem 
       Died 27 August 1933 Zoutelande 
       Married (2) 10 November 1937 Amsterdam 
       Mr. Cornelia Frida Katz, daughter of Mr. Samuel Katz and 
       Catharina Maria Anna Charlotte Geesink 
       Born 29 July 1885 Amsterdam 
       Died 30 March 1963 Aerdenhout 
                 Children, Generation I 

       Generation I 
        (1) 1  Barones Jacqueline Jeannette Mackay 
               Born 14 December 1899 Utrecht 
               Died 8 June 1979 Amsterdam 
               Married 5 June 1946 Amsterdam 
               Jhr. Mr. Johan Fredrik Theodoor van Valkenburg, son of Mr. 
               Cornelis Constantijn van Valkenburg and Agatha van Gilse 
               Born 31 March 1877 Amsterdam 
               Died 3 June 1975 Amsterdam 
                         S.P. 

            2  Barones Adelaide Cornelie Mackay 
               Born 3 July 1902 Utrecht 
               Died 1 May 1985 San Francisco 
               Married 30 November 1927 Ermelo 
               Gustaaf Carel Ferdinand Schoch, son of Mr. Dr. Charles 
               Ferdinand Schoch and Jkvr. Marie Adele van der Wijck 
               Born 26 February 1898 Paramaribo, Suriname 
               Died 23 January 1983 Saratoga, California 

            3  Barones Henrietta Margaretha Mackay 
               Born 16 September 1904 Utrecht 
               Died 18 October 1991 Arnhem 

            4  Barones Margaretha Clara Francoise Mackay 
               Born 27 August 1909 Nunspeet 
               Married 28 April 1937 Ermelo 
               Ds. Henri Jean Loui Andre Couvee, son of Ds. Evert Barend 
               Couvee and Marie Julia Andre 
               Born 3 July 1904 Schiedam 
               Died 5 January 1969 's-Gravenhage 

                                    Source Listing 
                                    -------------- 

           Nederland's Adelsboek 
           Den Haag 

           Kwartierstatenboek, 1983.