i´m researching all KRULL;KRUL;KROLL;KROL Family connection too.
especially Julie Kroll from near Wronki / Poznan Region.
Julie Kroll was born 9.6.1865 , Father Michael Kroll ; Mother Juliane Grundmann
She married Bernhard Braunholz 1864 in Stajkowo (near Wronki).
I also have also KROL; KROLL; KRÓL list datas from KZ Kulmhof/Chelmno and Paris Shoa Memorial Archives.