Named in memory of Sidonie Nádherná (1885-1950), baroness of Borutín and author of The Chronicle of Vrchotovy Janovice. She created a splendid park around her château of Vrchotovy Janovice in central Bohemia and became widely known as a friend of German poet Rainer Maria Rilke and Austrian writer Karl Kraus. She died a resident of Great Britain. Name suggested by J. Ticha.