Other ways to Write andDifferent spellings and
How is the AND sign (&) used in English in different ways?
In order to respond to this, we have to look into the story and origins of the symbol: That merchant has a pretty interesting story. Many of us do not know that it was only in the nineteenth centuary the twenty-seventh character of the British literabet after "Z", which, as we all know, is the twenty-sixth.
As a matter of fact, it is precisely for this that it was given the name Kaufmanns-Und. I' ll tell you, but first of all it is important to know that the symbology "&" stood before (about 1500 years ago) the term "commercial And". It is a Latin et, which means "and". See, teachers of the law, back when they were italicizing, they combined "e" and "t".
Below is an illustration of how it has developed over the course of the years into today's icon "&". Here 1 is the pristine Latin shape, 2 and 3 are from the fourth and 4-6th century: Let's go back to the source of the name ampersands. In order to prevent mix-ups with the pronoma "I", for example, it was expressed as "and per se I" during the chant.
Now that" &" was added as the twenty-seventh character to prevent mix-ups, it was spelled instead of "X, Y, U, S, and" as "X, Y, U and per se and". But since this was a long and bulky structure, over the years the four words were merged into an "ampersand" (the term was added to the glossary in 1837).
With the origins and histories of ampersands known, it is simple to understand why it is spelled in different ways. In principle, all three shapes in the picture you have added have developed from the characters "e" and "t", which, as you now know, are grouped into a Latin et.