Tschiediel, Jalowieski, Jansz-Stengert, Biedniakov-Bielakiewicz

I've been trying to research my family history and have reached a dead-end of sorts.

I'm searching particularly for the following names:
Tschiediel (which I believe may be German but I'm certain they resided in Poland for quite a while before WWII),
Jalowieski(definitely Polish),
Jansz-Stengert (Russian?),
Biedniakov-Bielakiewicz (Russian but eventually married into Polish family)

I'd also appreciate it if anyone has advice for researching polish genealogy from another country (I've never been taught polish which makes the searching harder).

Is there a particularly good site that could give me some information on my ancestors?
They tend to come from quite a varied background so one website may not cover all of the branches. I know my father's paternal grandfather came from Lodz in Poland and his surname was German, I'm not sure where his wife came from. I also know that my father's maternal grandfather was from a part of Poland on the border of Lithuania and his wife was from St Petersburg in Russia and he was an officer in the Polish army during WWII.

Is there also a particulary good english language website for researching members of the Polish underground? From stories I've been told, my father's paternal grandfather was aiding the Polish underground financially and got sent to jail multiple times when he was caught by the Germans but they needed his factory to keep running, which wasn't happening when he was locked away so he kept on being released, until a final time where he and his family were forced to flee Poland as things became too dangerous.

My grandmother has also told me that her cousin's husband was a key figure in the leadership of the Polish underground and was assumed dead towards the end of the war when he never returned home and they never found his body). I'd love to track these member of my family back and see if there is much documented evidence of these family stories.

I'd appreciate any advice.
Thanks

have you checked the 'Genealogy resources' on this site.

a clever trick with names is to search for them at ellis island records. it will answer you with alternative spellings, which can be useful. some other sites do the same... as does your google search box.

be careful when you enter a polish name at a polish website. some won't recognize l, n, s for ł, ń, ś etc.

spend some time at: ancestry.com genealogy.com JewishGen familysearch

Thank-you for your advice, I hadn't noticed the genealogy resources on this site but I will have a look.

The names I've listed are the original spelling - they were changed/ altered when my family arrived in Australia and I have a few different spellings of Jalowiecki that are listed on the families coat of arms. I don't think the Ellis island records would help much as the majority of my family came to Australia and not America, although I think some of my grandmother's distant relatives emigrated to the USA more recently so I may have a look.

Thanks for your help, I really appreciate it

Tschiediel? Maybe I'm a nut, but (if I'm not meshuga), baruch at! As for the other names... just be checking. If I'm right, make aliyah if you can.