Hi have quite a few Jakubowskis in my family. Kontancya Jakubowska , born in Rokicie, parish of Ligowo Bydgoszcz, Poland about 1840 her father Jakob Jakubowski, Mother Elzvieta Malanowski. in 1865 Jakob is already dead. Konstancy married Walenty rostkowski who was born in Turza Wilcza, parish of Tluchowo, Bydgoszcz Poland. his parents were Thomasz Rostkowski and Judwiga Trzcinska. they lived at Kozirog Lesny. They had Emelia Roskowska in 1865, That is my Grandmother. She was born in Myslakowko. she grew up and married Marjon(Marian) Ruzanski had 3 children born in suminek, Poland and come to USA in about 1890. They lived in dillonvale, Ohio, Marian was a coal miner. That had 9 more children here. On the baptismal certificates I have a Ladislaus Jakubowski as a godfather in 1902 and Ignacy Jakubowski as a godfather in 1900 for a nother child.. I believe they are my granmothers relatives that came her also.These records came from ST. Adalberts Church in Dillonvaale, My grandparents lived also in Long Run and connorville, all coal mining towns. Hope some of this will help you.