OK, Zytomir is in Volhynia so I am out of my comfort zone here but I will try to help.
I did some tweaking of the coordinates you gave to get "50,256364,29.255791" and that is just SE of Korostyshiv in Google Maps. Unfortunately the closest village to that location is "Holubivka" which isn't "Taubivka".
Perhaps "Tsarivka" at "50.356523,29.251099" is your village? It is 19km east of Korostyshiv.
Take a look at
http://www.volhynia.com/ for information on Volhynian Germans including links to a number of genealogy societies that include Volhynia in their interests. I can't see "Tomasheska" in the volhynia.com village list but I do see "Tomashowka". Alas, no "Taubivka" or "Ruprayk".
Another good resource for finding towns is JewishGen Gazetteer at
http://www.jewishgen.org/communities/loctown.asp.
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Regards, Murray
BlackSeaGR Forum co-Administrator
Gauer Family Website