Yes, it looks like such names are applicable only in historical context.  
German-language Wikipedia also avoids such names in article titles. While OSM based German-language maps prominently display different names, e.g. see https://www.osmap.de/#9/58.9358/25.5212

I'd suggest converting all "name:de" uses to "old_name:de" for current official settlements, streets and alike in Estonia.