+--Diederich Ropers  (EST 1812-)
+--Peter Ropers  (21 JUN 1846-15 AUG 1903)
|  +--Catharine Marie Viets  (ERR 1814-25 JAN 1857)
Diedrich Ropers  (25 APR 1874-6 OCT 1959)
+--Maria Viets  (14 NOV 1848-21 AUG 1911)