Looking for Kozakiewicz (and various spellings), Lugowski/ska and Dunajko

Hi,
I am looking for any information on my ancestors named Kozakiewicz (and alternate spellings), Lugowski/ska and Dunajko.
I've found that when translated from Cyrilic Alphabeth, Kozakiewicz can take many forms, and people might be from the same familiy even though the spelling might differ.

Any input on this?

thanks a bundle,
Nicolas Kozakiewicz

There are nearly 5,500 Kozakiewiczes in today's Poland, many living in the so-called recovered territories, assigned to Poland by the WW2 Big Three and populated largely by repatriates from the Soviet-annexed east and their descendants. The name is a patronymic meaning "son of the Cossack".
Ługowski started out as a toponymic nickname to mean "the bloke from Lyeville" and is shared by 3,900. Dunajko is on the rare side (only 204 users) and probably was originally used to identify someone hailing from the River Danube area.
For more information contact research60@gmail.com

Olimpic gold medalist pole vault Kozakiewicz is polish legend, or rather his gesture toward Russian public at stadium.