My name is Riku.
It originates from Rikhard (=Richard), Rickard, Grigori and Gregori (=Gregorius). Richard derives from German, French, and English "ric" (ruler, leader, king) and "hard" (strong, brave, court), therefore it means 'powerful leader' as well as 'King's Court'. Gregorios comes from Greece and originates from the word meaning "alert".
So I am an alert powerfull ruler. Or so wikipedia claims.