Gezin: Pieter Tjerk Willebrands / Maria Therese Erich (F416)
 | Franciscus Theodorus Albertus Erich (1896-1976) 
|
 | Jannetje Min (1896-1965)
|
Anna Erich (1917-2010)  |
| Egidius Theodorus Erich (1919-1993) |
 | Jannetje Erich (1920-2006) |
| Antonius Erich (1921-1999) |
| Theodora Maria Erich (1922-1989) |
| Therese Maria Erich (1924-2009) |
 | Franciscus Theodorus Albertus Erich (1926-2000) |
| Berendina Erich (1927-2012) |
| Adriannus Antonius Erich (1929-1935) |
| Maria Therese Erich (1924-2012)
|
 | Pieter Tjerk Willebrands (1921-2005)
|
 | Ronaldus Franciscus A Willebrands (1951-2003) |
| Carolina Antoinette J Willebrands (1963-1965) |