Johan Diedrick was born about 1840.
"South Africa, Dutch Reformed Church Registers (Cape Town Archives), 1660-1970 ," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VRLW-1JY : 6 August 2017), Johan Diederik Hartogh in entry for Willem Jacobus Hartogh, 14 Sep 1862, Baptism; citing p. , Richmond, Cape of Good Hope, South Africa, State Archives, Cape Province; FHL microfilm 2,214,505.
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