
1) Transcarpathian region 2) Ukrainian region
Found on
https://www.crosswordclues.com/clue/ruthenia

In English, Ruthenia ə is a geographical exonym for a cross-border region of Eastern Europe. It can refer to significantly different and even mutually exclusive areas, dependent on the historical period and subject. The word `Ruthenia` originated as a Latin rendering of the region and people known originally as `Rus`` – the same root word ...
Found on
http://en.wikipedia.org/wiki/Ruthenia

Region in western Ukraine, central Europe, on the southern slopes of the Carpathian Mountains, home of the Ruthenes or Russniaks. Dominated by Hungary from the 10th century, it was part of Austria-Hungary until World War I. In 1918 it was divided between Czechoslovakia, Poland, and Romania; independent for a single day in 1938, it was immed...
Found on
https://www.encyclo.co.uk/local/21221

a former province in E Czechoslovakia. Cf.
Found on
https://www.infoplease.com/dictionary/ruthenia
No exact match found.