Attached is the Death certificate for my great Grandmother Sarah Katz nee Haber, that lists her mother in 1913 the year she died as Rebecca Goldstein. The marriage record shows her mother as Rebeka Leder. 
I don't think that Joseph or Rebeka ever came to the US and neither did Michaels parents - My next project. Any direction (for both families) would be appreciated.
I could use help to make sense of these documents. 

In general, what is the best way to utilize Gesher Galicia?
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Marcie Murray
Minneapolis MN

I would probably trust the marriage certificate, because the data was given by Sarah. The death data may have been given by a family member who didn't really know the name of the mother.  

Fay Bussgang, Dedham, MA

It is not out of the question for an adult child to not know (or remember) their mother's maiden name.  Three of five of my great uncles got it wrong on their marriage license applications and my great aunt did not put any last name (1895 -1905).  In 2 cases their mother was still in Europe and in one case, she had died, so they could not ask her.  The first two actually gave their grandmother's maiden name. The third got the first syllable wrong (out of three).  In the case of the ones who used their grandmother's maiden name, I suspect they were thinking of the names of some of their cousins and got the relationships wrong.  Typically, I go with the information on the earliest document, but I here we can see that even those can be wrong.  Certainly, the informant on a death certificate may not have the correct information.
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Peter Cohen
California

Possibility is multiple marriages ; ie child was born to one parent who subsequently passed.  Surviving parent remarries and child is raised by step parent and surviving parent.  Thus both documents could be correct in their own way.
John Segedy, NH

Yes. The earliest document is the marriage certificate on 1894. Any opinions  or suggestions on how to proceed regarding the other documents that show Leder/Leider as Sarah's maiden name?
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Marcie Murray
Minneapolis MN

Also, these early documents appear to frequently be filled out by a clerk asking questions to ancestors with limited and heavily accented English, or a relative that was translating. A question about maiden name may have been misunderstood. I have a couple where the married surname name was entered that suggest that. And I have a death certificate for my GM where I know the info was given over the phone in 1949 and obviously misheard (you can tell when you know the correct name).
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Susan Watchman
Phoenix, Az

It is likely the same person.  I always imagine saying the name out loud with a heavy east European accent.  They could easily be the same name. An untrained ear writes what they hear.

Jean Jajan

I recently solved the puzzle of a woman whose maiden name was given in four London birth records in the 1880s and 1890s as Moses, Nipman, Neiman and Slatasky. DNA matches, hints and trees from other researchers (in particular Irene Plotzker) and JRI Poland birth records revealed that the woman's father was almost certainly Mowsza Nachman Stolarski.  So the question answered - probably by her husband - was: "what was your father-in-law's name?" 

So it's not completely impossible that Leder is a version of at least part of her father's given name - Leyba?
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Paul Hattori
London UK

Leder heard as Leba??  I have trouble believing that.  The two names sound too different.  If I were the supervisor in a vital records office and a birth records clerk wrote Leba for Leder I would call him on the carpet and tell him to shape up!  There is no excuse for doing that poor of a job, especially when he should have expertise in names, foreign and domestic.  

I would be careful that you're not trying to pound a square peg into a round hole here by saying Leba is Leder.  Leba may be Leba.  We genaealogists sometimes want to find an answer so badly that we accept unlikely solutions rather than digging deeper.  I have done so.  
--Josef Hannum