Hallo Tanja,
tanja salesch schrieb:
[...]
is there a possibility to create
an "symbolverzeichnis" or an "namesverzeichnis",
you can use the package "nomencl" for this. A description of how to use it with LyX can be found here:
http://wiki.lyx.org/pmwiki.php/LyX/Glossary
Grüße, Dominik.-