She is married to "Prof". Dr. Jan Frederik van Beeck Calkoen.Source 2
Child not included in tree: http://www.werelate.org/wiki/Person:Wilhelm
They got married on August 15, 1803 at Werkhoven, Utrecht, Nederland, she was 24 years old.
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Isabella Antonia Lucretia van Westrenen | ||||||||||
1803 | ||||||||||