List of sources:
Barnard, K.H. Personal names in South African conchology. Cape Town: Conchological Society of Southern Africa, 1965.
Cape of Good Hope. Report of the committee of the Albany Museum, 1891, 1900.
FamilySearch: Lilian Livina Leppan. https://www.familysearch.org/en/tree/person/details/GWSH-8RQ
Heese, J.A. South African genealogies, Vol. 5. Stellenbosch, 1999.