Oh and ur- is rather 19th Century in their Teutonic Hermanic version of Arthurian neogothicism which gave rise to Wagner. It lays claims to authentic antiquity, rather like Ye Olde Renaissance Fayre! The term is older, though, for example the House of Wurttemburg had its roots in the Counts of Urach, which is etymologically the Old Village, this nigh on a thousand years ago. They may have had reason: local discoveries suggest it was first lived in in the Early Stone Age, at the end of the last Ice Age. And you don't get much more Ur than that!