What's in a Prague street name

Zdařilá was built in 1938.

If something is ‘zdařilý’ (feminine: zdařilá), it’s successful, well done or just plain good. The adjective derives from the reflexive verb ‘zdařit se’, which means to succeed or to turn out well.

And, in 1938, whoever was in charge of names of streets decreed that the building job done over the last ten years or so, including the creation of multiple new dwellings, was, indeed, a job well done.