The only thing I can think of is that Webbey could be a form of Wiebe, which is already in the database and is listed as being used in Frisian. Alternately, could be a pet form of Webb (see: http://snipurl.com/dox1), either diminutised for the purposes of a given name or already diminutised in a pre-existing family surname.
It's not much, I know.
Miranda "Multiple exclamation marks are a sure sign of diseased mind" -- Terry Pratchett
Proud adopter of 15 punctuation marks. Check my profile for their names.