From late 18th century to 1918 wies/village Sokolow was predominantly a Polish village w/its own RC Parish. > Stryj was both the powiat (adm district - county) and the gmina (judicial/tax district) > Historic Galicia Province, administered by ethnic Poles for the Austro-Hungarian Empire (Habsburg Emperors). The filial Greek Catholic Parish was in Dzieduszyce Wielkie (today Velyki Didushychi). During the Interwar Period (1919-1938) Sokolow (means BELONGING TO FALCONS) was attached to the Stanislawow wojiwodstwo/region and became a part of Reconstituted Poland, which technically had not existed as a geopolitical entity for the previous 125+ yrs. Post WW2 this region was incorporated into SSR Ukraine under Soviet domain until 1991, when Ukraine became independent.
Your 500 yr old ancestral village of appx 800 residents was completely razed by 1944. The Polish population that survived was repatriated back to Poland. The territory of this historical locality appears to have been incorporated into that of the modern locality Podorozhnye = Подорожнє, Stryj, Lviv, Ukraine, latest zip 82450. Today all that is left of Sokolow is a statue of the Madonna in a field.
LDS has copied GC Registers for 1835-1905 Velyki Didushychi: https://familysearch.org/search/catalog/1417290
AND the RC Church Registers for 1678-1944 Sokolow: https://familysearch.org/search/catalog/669697
Exc resource for anyone researching their Galician Roots, includes a how-to tutorial re researching LDS Films.http://www.halgal.com/
If you find this will be too complicated for you and prefer a local to do the research for you, I can recommend someone w/exc references. He is also fluent in Ukrainian, Russian, Polish and English.
Today there are Yurkiw = Юрків (equivalent to Georgeson in English and is a very common surname in Ukraine) living in selo/village Podorozhnye = Подорожнє. FYI Podorozhye had a mayor in 2010 w/this surname.
I took a look at 1929 SS Melita Passenger Manifest and found that Teodor (probably called Fedko by family) and Tekla were not from Sokolow. They were emigrating from SIECHOW c/o Sokolow. At the time of emigration, Sokolow was the gmina (tax district) and this region was under Polish domain. Today this hamlet size village of 900 is called Сихів = Sykhiv. I left all info above, so you could understand what was going on in Stryj county during WW2.
Map - fiddle w/zoom top left to get perspectivehttp://drymba.net/uk/map/1012901-selo-sykhiv?lat=49.21137&am...
The Internet shows Сихів = Sykhiv as a large town of 37,000+, but this is an error. I called the mayor's ofc and verified info I provided in previous paragraph. Additionally, I also asked about your two surnames, Demkiv and Yurkiv, and was told that YES, there are still residents w/surnames, Demkiv = Демків and Jurkiv = Юрків, living there.
Siechow (Сихів) 1835-1910 GC Registers have been filmed. https://familysearch.org/search/catalog/1510757
Additionally, I also saw your post in Gypsy subforum re Szymon Czubko. Ellis Island (NY) does show a Semen Subko, arriving at Ellis Island Aug 31, 1913. He lists leaving his wife, Evdokhia, behind in Wosnjehicy > Minsk gubernia > Russia. I suspect that this derevhnya/village was/is Voshchinichi = Восщиничи > in Brestkaya oblast > Belarus today.
(BTW WW1 started in July 1914. During both WW1 & WW2, w/the exception of cargo traffic, there was hardly any civilian traffic across the Atlantic.)