Di'Shon Bernard

[MyDadWasAnArse]

This is a footballer. I can't work out what's missing in his first name to require an apostrophe.

Probably nothing. It’s just a fad name.

It's quite common in African-American culture. The apostrophe isn't necessarily being used to show omission/contraction.

Dishon
Dishon is a Horite clan name that appears in the Hebrew Bible in 1 Chronicles 1 and Genesis 36. The passages involved are about the relations between Horite clans, but they are written as though the subject matter was the genealogical relationships between individuals, one of them named "Dishon."[8] Dishon is described two times as the fifth son of Seir, but one time he is described as the son of Anah, who is in turn the son of Seir.[8]

Maybe the ' is to deter people from saying it as dish-un.