I'd like to start watermarking my images I post online with what I would consider a business name rather than just my nickname (I'm known as shakes in the real world to) I was thinking I should register a name to save possible future issues of someone else using the same name.

I've googled the name I'd like to use and there is a photography business in Arizona with the same name Being in Melbourne and photography is unlikely to be a commercial venture for me would this be of concern?

And is it worth my time and money to register the business? Or is there another way to go about it so I don't get possible conflicts in the future if someone else was to use the same name I'm proposing?

Thanks

Simon

(I hope this is in the right forum, sorry if its not)