Chinese unknown name, was baptised as Petronella Piters (her new Christian name) together with her two sons (fathered by Ulrich Gualtherus Hemmingson) in the Lutheran Church in Batavia (Jakarta) and became a "free Christian".

Before his departure to the Netherlands for good in 1790, Hemmingson marries Petronella Pieters. The ceremony takes place at commerce council in Macao, as Petronella may not visit Canton.
Simultaneously Hemmingson legalizes his four children, of which, the two girls were present. The youngest child is just born.
Both sons are still in their education in the Netherlands.
The vice-president of the commercial board, Van Braam, gave the wedding speech, and will succeed Ulrich as director.