I was fooling around today and found a couple of sites that will translate given names into Japanese kanji.  One site said that the name William can be written in kanji like this:

生伊利安夢

Supposedly this means the following:  life – noble, king – clever, advantageous – peaceful – dream.  I guess this means I spend my life peacefully dreaming that I am a clever king.

Another site said this:

The first kanji in your name means Be, the second means Will, the third means Reason and the fourth means Safe.  I take this to me the following:  “Will is reasonably safe.”  Or maybe: “Be safe and reasonable, Will.”

The funniest of all (I could not copy their image since they wanted $10 for it!) told me this:

The kanji used to write your name mean:
Having    Ideas    Reason    Asian    Warrior       
(You are a mighty Asian warrior who has many great ideas and understands the ways of reason.)

Perhaps it would better read:  “I have the idea that I am a mighty Asian warrior who understands the ways of reason.”

Anyway, it was a fun way to kill about 20 minutes.