Hi Kevin,
Sorry it has taken so long. I didn't find a Felix Kaminski listed in the Grand Rapids City Directory (like our phone book now) for the years 1896-1912 (this is the only info. I have of the history of this name in G.R.). Did he go by a different name? I found a 'Frank' (1896-1912) and a 'Charles' (1899) and the names I am researching, John Sr. and Jr. (1896-1912). I haven't searched through the 1913-present years yet. Do you know when they lived in Grand Rapids? Were Helen Janowiak Kaminski's relatives from G.R.? I'm sorry I couldn't find anything more. I will keep my eyes open for you! Let me know if you need any more help!