My grandmother was Katharina Focºan (married name Ursel), born March 18, 1899 in Woloka (Voloca), Ukraine. She had a brother named Dmitiri and possibly a sister too. She lived in Czernowitz Romania in the 1920's-1930's where she married and had 2 sons. She eventually moved to Dortmund, Germany before immigrating to Canada with her surviving son in the 1960's.
I am just at the beginning stages of searching for her lineage, but I had hoped someone here might read this and respond. This is really the only information I have on her family.
Does this sound like part of your family tree that you are missing?