Bujnofsky and Honzilko

Hi,

I have just started looking for the names Bujnofsky and Honzilko.  I know my grandparents were Slovaks but not sure were they were born.  I have immigration records and a few census but nothing more.  Any suggestions of how to find out where they may have been born?  I am a member of Ancestry.com and could not find much on them.  Thanks for any help you can give me.  By the way they lived in Connecticut.