according to

https: //www.wikitree.com/treewidget/Raubal-5/890

Elfriede Maria (Raubal) Hochegger, niece of Hitler had two children

1. Living: [private daughter (1940s - unknown)]

2. Living: [private son (1940s - unknown)]

But in the internet I can only find the son Heiner Hochegger.

Also

https:// www.myheritage.de/research/collection-10182/biographische-kurzfassungen-von-bekannten-personen?itemId=2321579&action=showRecord

lists for the husband of Elfriede Hochegger Dr. Ernst Hochegger only one child, the son Heiner Hochegger.