Here are some of the things to consider before choosing name:
2. Must relate to your business.
3. Easy to type.
4. Benefits SEO of your website.
Once you pay attention to all these four things, you can decide which is the good name for yourself.
Take a look at this name generator program. You add some words related to your business and it can generate the names for you. Or you can generate the name automatically. There are two of such sites that you can try for the name. Also do take suggestions based on the competitors in your store niche.
These two sites are good option to take a look at the names for the startups and e-commerce stores. If you check some of the startup incubator then you're surely likely to get some good options. Most likely that would get you closer to the better name suggestions.