Leonard Kellner

Leonard Kellner is an Austrian officer and diplomat, and the brother-in-law of Jan Prochazka, having married his sister Adela.

During the war, he served mostly as a staff officer, and was stationed in Wien from 1917 to the end of the war. Shortly after that, though, he was dispatched as military attache to the Principality of the Lower Don, stationed in Rostov.