I am German and have been an active editor in German Wikipedia since October 2004. My original user name there was Jossi, and files I uploaded to German Wikipedia between 2005 and 2012 were later transferred to Commons and attributed to Jossi~commonswiki.
At Commons, I have been a registered user since 2010. As the user name Jossi was already in use by someone else in en:WP, I chose Jeppi for my global account name and also here on Commons. My contributions as Jeppi between 2011 and 2013 may be found here.
Due to SUL finalization this user name had to be changed to Jossi2 in May 2013 (but please keep calling me Jossi). --Jossi2 (talk) 14:08, 25 July 2013 (UTC)