My business venture!

You probably want to think about if you'll be taking custom orders (i.e. I want this Mayhem babydoll modified as follows...) or if you'll be playing fashion designer and creating unique pieces that you'll put up for sale. Nothing precludes you from doing both of course, but one may appeal to you more than the other.
 
I doubt they'll permit these names. They have to be realistic, as you have to put an ad for a fictitious business name in the paper.
 
Seams of the Dead... The Hidden Stitch... Place of Sews... Seams of Misfortune... hmm. Tricky.