Using semi-famous names as a product
Hello, I have a business idea that uses the names of deceased people that may have become famous (or more famous, in a few cases) had history not ignored them or their contributions to various fields of expertise.
This business idea would use their name on a product and a description of why history ignored them. All would be done in a positive light -- that is hoping to correct the person's rightful status in history for the positive contributions made in said fields.
Is it legal to use the names in this case, or must I secure the rights with families (or trusts/foundations) first?