- Author: Ef Leonard Author Record # 20054
- Legal Name: Hummelman, Frans Leonard
- Birthplace: Rotterdam, South Holland, Netherlands
- Birthdate: 13 August 1924
- Deathdate: 29 July 2014
- Language: Dutch
- Webpages: De Boekenplank, genealogieonline.nl, shop.pr1ma.nl
- Used These Alternate Names: Frans Hummelman
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