Johannes Petrus was die seun van Philip Rudolph Nel en Gesina Aletta Pretorius.
Uit hulle pa se sterfkennis van 1919:
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eGGSA
library Gravestones in South Africa Eastern Cape : Ooskaap Eastern Cape,
KIRKWOOD, Urban area Eastern Cape, KIRKWOOD, Main Cemetery N - Vanne ::
Surnames - N NEL Johannes Petrus 1886-1979 & Maria Susanna GRUNDLING
1898-1981