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Petronella Johanna Johnston was born 5 NOV 1921 in Pretoria South Africa.. She died 22 AUG 1978. She was the daughter of Andrew Johnston and Johannna Rachael Slabbert.
Petronella Johanna Johnston's husband was Charles Johannes Tobius Bloem (1914-1978). They had four known children named "Joyce" Johanna Rachel Bloem, "Boet" Willem Petrus Andrew Bloem, Maria Martha Bloem, and Antoinette Bloem.