A dual illusion name is an illusion of two names, which is created with the help of 3D printing. It is a combination of two names that is visible from two different angles in the same nameplate. It is also known as a flip name.
Now understand why people called this flip name,
Flip name is the illusion of the nameplate in which 2 names are visible from two different angles by flipping the nameplate. It is also known as the Dual illusion name.