1. *Mask (company)*: Mask Labs, Inc. was founded in 2014 by Jordan Lippner, and later acquired by Facebook (now Meta) in 2014.
2. *Mask (theater)*: The use of masks in theater dates back to ancient civilizations, with evidence of mask-making found in ancient Greece, Rome, and Egypt. It's difficult to attribute the "founding" of mask use in theater to a single person.
3. *Mask (art)*: Mask-making has been a part of various art forms across cultures. Again, it's challenging to identify a single founder of mask art