503808. Willem Nicolaesz. Van Muijlwijck, son of Nicolaes Van Muijlwijck Jansz. Van Der Merwede and Adelida De Monchablon, died after 1336.
Willem married Rutgera Van Bysanten.
The child from this marriage was:
251904 i. Jan Willemsz. Van Muijlwijck (died in 1423)
503809. Rutgera Van Bysanten .
Rutgera married Willem Nicolaesz. Van Muijlwijck. Willem died after 1336.