[Ger-Poland-Volhynia] CYL and CYLC

[Earl.Schultz]

In the Michalki-Rypin Ev. parish the names CYL and CYLC appear frequently,
1810 to 1865.  I have seen one or two times when the names were
interchangeable but this seems like the exception.  Can someone tell me for
sure whether these are two different names and what their German/English
equivalents would be.  I've seen CYL = Ziel and maybe Zielke would come from
that.  

Thanks,
Earl