By searching on Google, I found the following link:
http://mvassist.pair.com/Vendir/Berechit.html According to this page, Loeb means the following (and I quote):
"Loeb or Löw or Loew is the German word for "lion"."
The creator of this site researches the history and origin of the Loeb surname (among others), so I suggest that you should contact him/her in order to get more information.
Regards,
Lucille