OK, I'll rise to the challenge! :-)
The simplest explanation is that your name is just a combo of
Arik and Shawnie. Shawnie itself could be a nickname of
Shawn (using the Scottish
-ie diminutive) or an alteration of
Shawnee, the Native American tribe. Wikipedia links to a site which reveals that the tribe's name is derived from Algonquin
shawun (or
shawunogi) "southerner"; the site is here:
http://snipurl.com/cvgt.
Miranda
"Multiple exclamation marks are a sure sign of diseased mind" -- Terry Pratchett