grandmother.
germans name their children after their parents (the childs grandparent.)
Hitler had a child with Angela Hitler,
Which was proibably her mother (she looks the most like adolf)
the picture of hitler with the little BOY with angela's short hair was probably her father.
It's a BOY because of the lederhosen, worn by BOYS in germany during this time.
Where a similar haircut was popular for young BOYS.
Your middle pic related is NOT a girl.
Clear?