Pat Fuller asked the surname experts in this group whether LEWITHAN
(LEVITAN) and LOEWENTHAL can be different versions of the same surname.
I'm not a surname expert, but based on the different roots of these
names - and some personal experience - my answer is no. LEWITHAN and
its variations signify Levitic origin, and LOEWENTHAL is related to Loeb
and further back to Leib, and then to its Hebrew equivalent Arye, all