@Juliet Pitre Sorry about this late reply, but all I know is that the tree that extends from my grandmother is, as far as I know, fairly accurate. My family was concentrated in the western part of modern-day Ukraine, near Lutsk. There is a website, wolyn.ovh.org; if you don't understand Polish, google translate does a fairly accurate translation (although there are a lot of annotations people make in regards to their families). Hope this helps somewhat!