The "Nederlandse Voornamen Databank", to be found here:
http://www.meertens.knaw.nl/voornamen/vnb/
gives Bregje as as form of
Brecht, and that in turn as a short form of various names containing the name element "brecht" which is also in the database here, cognate of the English word "bright".
For Behati I could not find reliable info, only some hints that it may derive from (or be a variant of) the Swahili word bahati, probably meaning "luck":
http://en.wiktionary.org/wiki/bahati
Anyway, if you search for the given model, you quickly see that her name is written in both forms, Behati and Bahati. Maybe that wants to tell us something, or maybe not - maybe people just are not sure about the spelling...
This message was edited 5/21/2012, 12:13 PM