My father, THOMAS HENDRIK KöRNER, is the son of GEORGE SYLVESTER KöRNER and MARIA ELIZABETH (nee STEYN). She is the daughter of THOMAS HENDRIK UNDERHAY (1903-1987) AND MARIA ELIZABETH (nee STEYN). He is the son of PETRUS ALBERTUS (Jr.) UNDERHAY and MARIA ISABELLA van der MERWE.
Does anyone have DOB & DOD for the Petrus Albertus (Jr.), his father Arthur William (1814 - ?) and Maria Elizabeth van der Merwe?