Hey rockasracoon! I have always very much enjoyed your posts about references in Divinity II, but this time I spotted a mistake.
"Heilewell" is not "Hywel" in the English version of the game, but "Halliwell" (which – as far as I know – is not Welsh).
Also, the line "Gehet hin und..." (Go ye forth and...) does indeed sound "bible-ish", but it wasn't a conscious biblical reference on my part.