Although the authors are British, and there is a bit of bias towards names used in the U.K. it is well researched. They could have double-checked US sources a little more when commenting on its use as a US name. Yet, this only means that they wrote what they knew to be true rather than making wild uninformed guesses. For instance, they suspect that "Oprah" was a form of Orpah but without being completely sure they only list it as a supposition and attribute it's existance in the US to Oprah Winfrey. Their linguistically inspired guess was correct! Oprah has mentioned in an interview that her name was a typo of Orpah. Not having this obscure information, the authors did the responsible thing.
In fact, they deferred to consultants for the appendices for cultures they were not familiar with.
This book is great for students of onomastics, parents and authors.
