[Ger-Poland-Volhynia] Polish translation, Please

[Dave Krause]

Hi to one and all;
I'm working on films (3719597&8 - Grodziec Church near Konin, Poland)
and have come across an unusual occurrence in the index name field for
deaths.  The last name is followed by "etnna" - w/o quotes.- and
precedes a given name.  Any suggestions as to what this could mean?
It only occurs three times in 255 entries. Thanks in advance!
Dave Krause