Did the family cross the pond ?? If so maybe some children were born elsewhere ........Maybe records are just not available for other children..What is the last borthyear you have ??
Good the names, there are many refs on the www
Rik van Brummelen, geb. 1859 te Nijkerk (GE), zoon van Harmen van Brummelen en Gijsbertje Plas
Gehuwd 23 feb 1887 te Nijkerk (GE) met:
Jannetje Kroon, geb. 1866 te Putten (GE), dochter van Pieter Kroon en Willempje Kraaijenhof