[Ger-Poland-Volhynia] selenaja or selenkaja

[garymwiese]

My Grandfather's marriage certificate says that he was married in Rowno parish by Ernst Althausen  who was the pastor for evengelical parish of Rowno.  
The sggee web site shows a Selenaja as a congregation but the marriage certificate says Zelenyi dub .  There is a present Zelenyi Dub at 501428,260758
south of Rivne.  Are these the same place but different names for different times?
Thanks
Gary Wiese