Here is a thought. In old German handwriting the capital B is sometimes confused with the capital L (for instance the name Bernhard can be mistakenly read as Leonhard). With that in mind Kolonia Laden may be the colony of Baden which was in the Kutschurgan district in the Black Sea Region of Russia (now Ukraine). There was a family in Baden by the name of Kohm. Also quite close to Baden was the Germany colony of Strassburg where the Feist family name existed.
If you have not already done so, check out the Kutschurgan pages at the Germans from Russia Heritage Society website http://www.grhs.org/chapters/krig/index.html