The word PEPSI did not exist until the cola was invented. PEPSI created a brand and became known because of the product they produced. Using a word that didn’t exist allowed them to stand out and become known.
If you don’t come up with a name in the first 10 minutes you should shelve this part for later. It’s only going to hold up your growth process and the ability to launch the idea. Names don’t matter in the long run. It’s about the product. It’s about what you stand for. It’s about how you treat your customers.
Before you stress out about your name make sure you know exactly what your product does, and who your product is for.