I wonder: is the pseudonym "Haruo" an Esperanto word?

As I first began to encounter Haruo's posts, I assumed that it was a ("real") Japanese name, and that he (or perhaps she) was a Japanese person with unusually polished English language skills and an intense academic interest in the English-language folk ballad tradition.

I realize now that I was mistaken, but I am still curious about that most unusual name/handle and whatever it might mean....