I take it you have already looked in Jewishgen for any birth and marriage records for the six Volk siblings. For example, the birth records for any of the six siblings,or  marriage records for any of them if they married in Lithuania, and any birth records for children born to any of the siblings in Lithuania. From my (somewhat limited) experience, I don't recall ever seeing a Russian/Hebrew marriage record where the father of the groom and father of the bride were not listed.  And for any birth records, for the father of a child, his father's name would also be listed. 

If you have located at least some of these birth and marriage records, and still don't see the mystery father's name, then I believe you have a different question to ask here on this discussion board: What might be the reason(s) that a father's name would not be listed on either Russian/Hebrew records, or on US records, especially in the Hebrew portion on a gravestone and on death certificates.
--
Michele Lock

Lak/Lok/Liak/Lock and Kalon/Kolon in Zagare/Joniskis/Gruzdziai, Lithuania
Lak/Lok/Liak/Lock in Plunge/Telsiai in Lithuania
Rabinowitz in Papile, Lithuania and Riga, Latvia
Trisinsky/Trushinsky/Sturisky and Leybman in Dotnuva, Lithuania
Olitsky in Alytus, Suwalki, Poland/Lithuania
Gutman/Goodman in Czestochowa, Poland
Lavine/Lev/Lew in Trenton, New Jersey and Lida/Vilna gub., Belarus

There's a few Walk/Wolk/Valk members in my tree from Latvia immigrated/emigrated to the US via NYC.

There's a few others I've never really pinned down where, when or if they traveled elsewhere at the moment.

-- ~Brian D. Kerr, Esq | SSG, U.S. Army (Retired) | SSA, Brigade G1, U.S. Army (Retired) |>>Known Family Surnames (Researching): Dessler, Walk(Valk), Mahler (Maler), Paradisgarten (Paradisegarten), Tomasy (Thomashy), Gluck, Preisz (Priess), Steinhardt (Steinhart), Grossman (Grosman), Sholtz (Shultz), Kaplan, Bloom, Fischer (Fisher), Levy, Baum, Duwidewic, Meisal (Maisel)<<|>>Known Family Locations/Regions (of Surnames): Poland, Ukraine, Russia, Hungary, Lithuania<<|

Thanks for your suggestions.  My ancestors did not, however, emigrate to Canada; five of the siblings and their mother went to the U.S. and one son to South Africa. All of that emigration activity took place over a compressed period of time - they all appear to have left the town or village in Lithuania where they had been living and traveled directly to a port(Libau, Latvia in those cases where records exist) without residing, even briefly, anywhere else in the Baltic states. None of the emigration, naturalisation or death documents for any of them provided the name of the siblings' father or the mother's husband.  I have grave records for each together with obits where they existed - none provide anything more than the mother's name.  The children and grandchildren of those siblings(not many in number) neither saved nor still retain any ancestral records or even anectdotal evidence of the people from whom they descended.  The sibling's father is the mystery element in this family.  It seems likely he died sometime after the birth of the last sibling(1887) and the start of the emigration by family members(1901).  Beyond that assumption nothing certain is known.

David Wolk, Ontario, Canada

I assume your Wolk family immigrated to Canada, so here are some avenues to explore –

The six siblings who are the children of Leba Volk will have left numerous records that would contain the name of their father. These would be their death certificates and their gravestones (for Hebrew name of father). From the Hebrew name, the most likely Yiddish name(s) that the father used in everyday life in Lithuania can be figured out. Their death certificates should also list where each sibling is buried.

I seem to recall reading here on the discussion board that someone was cataloging the gravestones in Jewish cemeteries in Toronto. Perhaps someone else here has information about that effort.

If you aren’t sure of the death dates of some of these siblings, you could look for newspaper obituaries. Also, check out family trees on Ancestry.com, to find those that contain any of these siblings. Those might have information about death dates, or even info about the siblings’ father.

Another source of information might be your second cousins (grandchildren of the six Volk siblings). I’ve found that second and even third cousins often have family stories or old family trees, that are really indispensable in learning about forebears from 2-3 generations ago.

With regard to Jewishgen records – In looking for my Leybman and Lak forebears in Kovna gubernia, I found it useful to search across an entire uyezd (district), rather than focusing on records from one town at a time. My forebears moved around more than I realized. I also was able to locate records for married daughters this way.

You can check on the Routes to Roots website (https://www.rtrfoundation.org/index.shtml), for which Jewish records have survived for individual towns. For some Lithuanian towns, the records can be rather sparse.

And lastly – in the late 1800s, there was some movement of Jews from northern Lithuania to the city of Riga, Latvia. I have found Lak forebears there, who lived in the city for some time prior to immigrating to the US. You might locate some Volk family members there.

Good luck with your searching.

--
Michele Lock

Lak/Lok/Liak/Lock and Kalon/Kolon in Zagare/Joniskis/Gruzdziai, Lithuania
Lak/Lok/Liak/Lock in Plunge/Telsiai in Lithuania
Rabinowitz in Papile, Lithuania and Riga, Latvia
Trisinsky/Trushinsky/Sturisky and Leybman in Dotnuva, Lithuania
Olitsky in Alytus, Suwalki, Poland/Lithuania
Gutman/Goodman in Czestochowa, Poland
Lavine/Lev/Lew in Trenton, New Jersey and Lida/Vilna gub., Belarus

Movsha and Hana Azvalk or Volk lived in Jurbarkas and Jonava, Lithuania from approx. 1820 through 1890.  They had several children, one a son who would have been born circa 1845-50.  That son is believed to have married Leba or Liba Breski whose family lived in Krekanava.  That Volk son and his wife Leba had at least six children, all of whom emigrated as young adults from Lithuania.  Two of those adult children reported on their emigration documents that they had previously lived in Petkuny, Lithuania.  After emigrating all of the children and Leba used the surname Wolk.  Leba's emigration documents in 1908 reported her as a widow. I am unable to find any documents or family references that provide a confirmed name for Leba's husband and the the father of the six children.  Birth, death and burial details remain unknown.

Any suggestions or guidance for identifying Leba's husband greatly appreciated.

David Wolk
Ontario, Canada