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- [S57] de Villiers, C.C., revised by Pama, C., Genealogies of Old South African Families, (Published A.A Balkema, Cape Town, 1981 ISBN 0-86961-136-4), Entry for van Zyl (Reliability: 3).
- [S17] Marena van Hemert, Ou Swellendam Families Deel 3, (M. van Hemert, Linden, Johannesburg, 2006. ISBN 0-620-31296-7).
- [S572] Baptismal Register Colesberg NGK, (Colesberg Nederduits Gereformeerd Kerk (NGK), Colesberg, Northern Cape. baptisms register, 1837-1843. Repository: NGK archives, Stellenbosch University, G16 3/2. Transcribed by Annelie Els, independently, from Pretoria Archives FK 2277).
- [S978] South Africa, Cape Province, Probate Records of the Master of the High Court, 1834-1989, (accessed at familysearch.org), 1848 Death Susara Johanna Elisabeth van Zyl (Reliability: 3).
- [S978] South Africa, Cape Province, Probate Records of the Master of the High Court, 1834-1989, (accessed at familysearch.org), 1889 Death Johannes Wilhelm van Zyl (unindexed) (Reliability: 3).
- [S1037] South Africa, Cape Province, Kimberley, Probate Records of the Supreme Court, 1871-1937, ("South Africa, Cape Province, Kimberley, Probate Records of the Supreme Court, 1871-1937," database with images, FamilySearch (https://familysearch.org), 1881 Death Notice Geertrui Anna Geldenhuijs (Reliability: 3).
- [S979] South Africa, Civil Marriage Records, 1840-1973, (database, FamilySearch (https://familysearch.org)), 1844 Marriage Susara Johanna Elisabeth van Zyl and Hermanus Hendrik Rabe (Reliability: 3).
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