hiya Ontario - it is often the 'luck of the draw' when searching ....
For German Mathematician - went Wikepedia Homepage
http://en.wikipedia.org/wiki/Main_Page
and typed in 'Number Theory' ....
this got me to .....
http://en.wikipedia.org/wiki/Number_Theory
Srolled down the Article - and focused on the names given in the section about the 19th century ...
One of the names was 'Dedekind' .... followed the link
http://en.wikipedia.org/wiki/Dedekind
and came to a biography of 'Richard Dedekind' which listed all his names Julius Wilhelm Richard Dedekind, and the comment -
' As an adult, he never employed the names Julius Wilhelm.
Hope this helps
{Wikepedia is not always entirely 100% accurate) ....
so, when I use Wikepedia, I check out the facts to another source ..... in this case I put the full name Julius Wilhelm Richard Dedekind into Google and came up with many sites that agreed.