No children recorded
The 1996 tree records no children for Barbara. That may be right, or it may be a gap — the early generations followed the male line only, so daughters were listed but their families were not.
Where this came from
Árvore de Mapas — the Kallás family tree, compiled by Georges Mikhael Kallas.
Recorded as a spouse in the Árvore de Mapas. Only a first name was written down.