in reply to Name Space
I feel silly using my real first name as a nick after reading all those descriptions. Anyway ... it's not just a first name. My official first name is Jan, which is one of the most common names in Czech lands. But luckily my parents did not use the usual spoken form of the name "Honza" (comes from German "Hans"), but Jenda. And outside the family I was the only Jenda I knew. Felt good among all those Honzas.
When I subscribed to the Perl-Win32 mailing list we were two "Jan"s there. Me and Jan Dubois. So again I signed as Jenda. And it was natural to use it as a CPAN id. (I scaned the list of registered CPAN ids at that time for people from .cz domain and found only two more. Both were named Jan. But luckily JENDA was still free.
Being a Czech name Jenda is not often taken on US based servers so I can use it as a nick most of the times. If I can't JendaPerl is always free ;-)