1. As a company name:
* Johnson & Johnson: This is the correct way to refer to the pharmaceutical company. The "&" is essential.
* Watson's: This is the correct way to refer to the pharmacy chain.
2. As a general term:
* Johnsons and Watsons: This is grammatically correct but sounds awkward. It implies two separate entities, which may not be the intended meaning.
* Johnson's and Watson's: This is a more common way to refer to multiple entities, but it still sounds a bit clunky.
3. When referring to individuals:
* The Johnsons and the Watsons: This is the correct way to refer to two families.
* John and Watson: This is the correct way to refer to two individuals.
It's best to use the specific company name or the full name of the individuals involved to avoid confusion.