Ancestors of Jurriaan Kalff

                             /--Gerrit Kalff  b. 30 JUN 1856 at Zwolle  d. 31 AUG 1923
                     /--Gerrit Kalff  b. 1 SEP 1889 at Amsterdam  d. 1 AUG 1955
                     |       \--Johanna Jacoba Elisabeth Momma  b. 19 SEP 1861 at Amsterdam, Netherlands  d. 12 OCT 1946
             /--Roland Kalff  b. 7 MAY 1920 at Amsterdam  d. 13 APR 1983
             |       |       /--Herman De Vries Robb
             |       \--Margaret De Vries Robb  b. 29 SEP 1894 at Amsterdam
             |               \--Alice Joynson
Jurriaan Kalff
             |       /--Johannes Hendrik Thiel
             \--Jacoba Cornelia Thiel  b. 23 MAY 1924 at Haarlem
                     \--DanieIla Jacoba Van Der Harst