Hi, I'm Lambor from Kanovice in Morava
It would be helpful if you have mentioned that you were referring to a topic already raised in this thread, and particularly to this message:
My first Lambor was born about 1812 in Kanovice, Moravia
So you are in fact providing part of the answer to the Renia's quest. Thank you.
I'd like to add that, according to Moi Krewni database, there are only 11 people of this name in contemporary Poland, and five of them live in city of Kraków - which supports Renia's claim.
LAMBOR: probably derived from the German first name Lambert; possibly a toponymic nick for someone from Lambertowice or similar.
You were already involved in this topic way back,
PIASEK: sand; could have originated as a toponymic tag for someone from Piaski or an occupational nick for a sand-digger (piaskarz).
That's Czech name Plášek, not Piasek. The poster is probably very much aware of where his name comes from since "pláš" translates to Polish: pochwa, osłona, płaszcz, otoczka and to English: sheath, jacket, coat, casing. It seems like Polish "płaszcz" comes from "pláš".