Originally Posted by TBox
I'm voting ミハウ. I can think of a few reasons someone might write that. It's the name Michal in kana, could be a foreigner practicing their calligraphy with their own name, or the autograph of someone who's been in Japan too long (or of mixed descent), or an item from a "Your name in kana!" booth next to the airport.
This might be it: Michal (Polish name for Michael).
To the OP; Trust me, whoever wrote this has 0 idea of how to write Japanese characters with a brush. You should get your money back.