Hello Martin!
I think I may have something on your family.
I have Stefan Iwanicki b. 1863 married Julia, residing in Graffton, WV in 1910. Their son Andrzej b. 1893 immigrated in 1910 on the ship Vaderland.
Stefan may have had a brother Iwan Iwanicki b. 1862 who immigrated to Graffton on the Blucher in 1910. He was married to Anya Finkowiat and had children Michael (b. 1890) and Maria (b. 1892) baptized in Stefkowa.
Olszanica, of course, is close to Stefkowa.
Have you seen my Stefkowa website:
http://home.comcast.net/~jkhouser84/stefkowa.htmI would appreciate any data you can share on your family as I continue researching; a copy of that marriage record and any other papers would be absolutely wonderful.
I look forward to hearing from you.