I've never seen both names in the same record. 

With other families, the farm name (alias) is listed in the same record as the surname.

Is this just a variation in how the record is written?

Per your suggestion, I am going to merge all the records with these names and see if there is a pattern.

Thanks.

Mary

I am researching the Sambron, Slovakia GC church records.

Two surnames I am looking at are Szeglya and Szedlak/Sedlak.

There are several times when the names seem to overlap in a family.

Example:  birth record uses Szeglya and death record uses Szedlak.

Example:  majority of birth records in the same family have the Szeglya spelling but others are spelled Szedlak.

Are these the same name with spelling variations or language cases ?

Could it be a Hungarian vs Latin issue?

I've considered a handwriting issue but there are too many occurences and the handwriting is relatively good.

Also what is the Cyrillic spelling of both of these names?

Thanks for your help.

Mary