The Leeuwenhoek wills opened by notary Joris Geesteranus in the presence of the heirs
Notary Joris Geesteranus gathered Maria van Leeuwenhoek's "joint surviving friends and Præsumptive Heirs ab intstato" at a meeting on the day after Maria's burial to open the will, "threaded with a Red Silk Thread, and sealed in 5 distinct places with the cachet of the late Notary Mr. Jan de Bries." Seven heirs and heirs' representatives attended:
- notary Johan Willem Bertrand, representing his mother-in-law Margareta van den Heuvel)
- Coenraad Sceperus
- Philips de Molijn
Three of the four children and heirs of Jan Haaxman (missing Cornelis Haaxman):
- Maria Haaxman, assisted by her husband Steeven Bolland
- Adriana Haaxman
- Dirk Haaxman
ONA inv. 2791, no. 23 Joris Geesteranus;
also has originals of wills of 1721-11-17, 11-26, and 11-30