It’s not correct to call the creature Frankenstein.
Nor is it correct to call the creature Frankenstein’s Monster.
The truth is, the creature measured exactly one on The Frankenstein Scale.
Dr. Frankenstein created a unit of measurement.
With zero representing something completely harmless and one representing something that was as scary and dangerous as that creature.
Now, if you had two identical creatures, they would not necessarily measure two on The Frankenstein Scale.
There may be some inefficiencies and overlap, resulting in a score less than two.
Or, they may cleverly work together, resulting in a score greater than two.