"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:QLZW-PSK2 : 16 November 2020), Reinier Leonardus Gerardus Krop, Birth 25 Jul 1897, Utrecht, Nederland; from database, openarchives (https://www.openarch.nl : 2016); citing Utrecht, archive 481, inventory number 144-02, record number 1838; ; Het Utrechts Archief.
Vater: Gerrit Krop
Mutter: Reiniera Hendrika Schreutelkamp