Koltenon and Kamorannka - cities in Russia? Latvia? #latvia #lithuania #russia

BSR352
 

Good morning. 
I am trying to find the birthplace of a great grandfather who has written on different documents Russia/Latvia/Lithuania. The town listed on two documents is Koltenon (or Koltanon).

I thought it could be a border town between Latvia and Lithuania but haven't found anything that sounds similar. 

On his official Petition for Naturalization, in April 1925, he disavows allegiance to the Republic of Latvia in order to become a US citizen. 

At the same time, his wife is listed as being born in Kamorannka, Russia, which has also drawn a blank. 

Has anyone encountered Koltenon before? What about Kamorannka?

BR,
Bryan  

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