I have a list of 263 Jewish Taxpayers >from Raczki Poland in 1863 (see
Kehilalinks - Poland - Raczki).
One of the names is Sera Percyk listed with occupation "krawiec". The
other 262 names are commonly used male names. The Polish translation
for the occupation on Google is "tailor" or "sewer".
I had never seen a male name similar to Sera. I would have remembered
because my wife's name is Sara. I could not find other online records
for this person or any other person with given name Sera or even close
like Sira and was clearly a male.
Please add this to the list of questionable Jewish given names