it can of course be written with the japanese alphabet, but I've never heard of it. Should be extremely rare if it has been used at all already. I suppose you got it from the Ghibli movie? In there the name is "Osono-san", seems to be "Sono" in Katakana with the "O" of respect and "-san" afterwards. Looks like some kind of title or nickname to me, but not a real name.
Hanako on the other hand is very common ^^