He is married to Margaretha Straalman Vrouwe van Ruwiel.
They got married on May 17, 1769 at Westbroek, Utrecht, Nederland, he was 25 years old.
Child(ren):
Raad van Amsterdam 1787-1795, commissaris 1763, schepen 1780, drossaard en kastelein van Muiden, baljuw van Naarden en Gooiland, hoogbaljuw en dijkgraaf
http://gw2.geneanet.org/index.php3?b=kooler⟨=nl;pz=louise+elisabeth;nz=koole;ocz=1;p=gerrit;n=hooft;oc=4
Bron: http://genealogics.org/getperson.php?personID=I00075343&tree=LEO
The data shown has no sources.