Willem Hendrik de Beaufort
Willem Hendrik was born in 1775.  He died at the age of 54 in 1829.

 Cornelia Anna van Westrenen
Cornelia Anna was born in 1777.  She died at the age of 62 in 1839.

 Arnoud Jan de Beaufort
Arnoud Jan was born in 1799.  He died at the age of 67 in 1866.