Hey Beth,
I feel your pain. Naming your business can be one of the most difficult parts of getting it off the ground. It's easy to over-analyze and drive yourself crazy.
The name I selected for my business is Nocturnal Graphic Design Studio, LLC. It's a mouthful, and I typically shorten it to Nocturnal, or Nocturnal Design. It is derived from the fact that many years ago, while employed as a Creative Director with another agency, I was dabbling in the occasional side project at night, after work. When those side projects got to be a significant volume of work that made it reasonable to establish a business, for tax purposes, Nocturnal seemed like the appropriate name, given the circumstances. Eventually, when I struck out on my own full time, the name came with me.
It's served me well. There is a part of me that would have selected something different had I known at the time that I would be launching my own studio under the monicker (it wasn't my intent to do so back then). But, I have a great deal of equity in it now, so I won't be changing it any time soon.
I don't know that there is any moral to that story, but I thought it would be helpful to share how another entrepreneur decided on a business name.
To your case specifically... I like HINT. It's whimsical, mysterious, short, and easy to remember. Your name is beautiful, but I can see how spelling errors with Hemmila might present a problem, plus it might be difficult for people to recall the name. HINT is a word we all know, and it's easy to remember.
You have a unique situation because you are an artist. Although you're selling a product, it's really your name that gives it it's value. Have you considered HINT, by Beth Hemmila? Visually focus on the HINT part, and keep your name as sort of a tag line. Eventually, one or the other will develop the equity, and you can drop the other. Remember, POLO is actually POLO by Ralph Lauren. Everybody just says POLO, but his name is always emotionally attached to that brand. That's just an idea to consider.
I concur with what Mark advises above. Trademark issues should be addressed. A quick online review of the Oregon corporation commission web site will probably reveal if anyone else is using HINT. Beyond that, it's always advisable to consult a trademark attorney. After deciding on a name you'll need to develop a visual identity, i.e. a logo, business cards, a web site perhaps, and some other collateral materials. Before making the investment in design and production you want to make sure that you have the full rights in your business name. You don't want to have to throw away a lot of material because you found out after the fact that you're infringing on someone else's copyrighted name.
Bottom line is that, like Jeff above, you can successfully change your name later if you so choose. Ideally though, you'll want to have so much equity and recognition in the name and brand that changing it wouldn't be worthwhile. So, start with your best foot forward, and select something you feel you'll be comfortable with for the long haul, and then make sure you address all the legal issues so you aren't surprised by something later.
Good luck!