Unique Baby Names

We (meaning our modern culture) like to have unique baby names. This is no less true for my wife and I. I certainly don't know any other kids named Luther or Anthea. But perhaps we wouldn't have fared so well in the 1600s in George Herbert's church. Writing of bringing children for baptism, he counsels pastors in this way.
"He admits no vain or idle names, but such as are usual and accustomed."