Helen Sophia Rosen (Grunbaum) - 👋 Hello!

I am trying to contact any of the family members of Helen, she donated stuff from her family to Washington Museum Jewish history. Her grandfather Henry was the brother of my ancestor Julius Grünbaum, she donated photos that were from my family, taken by Josef Löwy. I would like to contact any member of the family if they might have letters from the family? Thank you!