Not sure if this is relible but found this
Bartko
Polish and Slovak: from a vernacular pet form of the personal name Bartolomaeus (see Bartholomew).
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
Found at
http://www.ancestry.com/learn/facts/Fact.aspx?fid=10&yr=0&ln=Bartko
A childs smile is worth more to me than Gold