Gijsbert Tromp en tant qu·Äôentrâ©e de Johannes Josua 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:QLNQ-YZHM : 30 August 2017), Gijsbert Tromp in entry for Johannes Josua Tromp, Death 13 Dec 1882, Heukelum, Gelderland, Nederland; from database,
openarchives (https://www.openarch.nl : 2016); citing Heukelum (Lingewaal), archive 0207, inventory number 33830, record number 41; ; Gelders Archief.