Gijsbert Tromp en tant qu·Äôentrâ©e de Cornelis Tromp, "Netherlands, Archival Indexes, Vital Records, 1600-2000"
"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database,
FamilySearch (
https://familysearch.org/ark:/61903/1:1:QLNZ-C94M : 30 August 2017), Gijsbert Tromp in entry for Cornelis Tromp, Death 17 Dec 1832, Heukelum, Gelderland, Nederland; from database,
openarchives (https://www.openarch.nl : 2016); citing Heukelum (Lingewaal), archive 0207, inventory number 33828, record number 15; ; Gelders Archief.