How to pronounce łukasz?

lu - cash (almost as money, but spell "a" instead of "e")

to be more precise we have to spell ł witch is polish special letter. It's pronunciation is similar to "w" in words:
*weekend
*Wednesday
*where
so łu in the beginning we may spell as the beginning of the words wood, wool etc

Łukasz = woo - cash :)

First name

polish

From Lucas, Lucius - bringer of light/enlighten/waking up on dawn