John Oggelvy was die seun van Louis Frederik Johannes Nel en Cornelia Margaretha Douglas.
Tydens die doop, No 63 Ladybrand NG Kerk 4 September 1910 ds PS van Heerden, is die getuies: Jan Frederik Strydom, Hester Catharina Nel, Gideon Lourens, Isabella Margaretha Cornelia Douglas.
(https://www.myheritage.com/person-5027759_148888701_148888701/john-oggelvy-john-ogilvie-nel)
(https://www.myheritage.com/person-5027775_148888701_148888701/elizabeth-christina-nel-gebore-botes)