Not to quarrel, but I think it is funny that the first thing that comes up in Google for "Abendigo" is the gladpet.com list of names for dogs, which includes both Abendigo and Abednigo.
The name may not be all that common in the UK, but it certainly was well-known in North America in the 19th century, and is used currently by at least one musical group performing in the States.
This, of course, is not a flaw in the method, just the caution that multiple working hypotheses must be applied.