Given names these days

I guess I am asking the wrong question.
Without any disrespect to African-Americans, the names I am asking about are the ones that in the last 25 years or so have surfaced with odd to me spellings and unknown origins.
Some examples are-
Jedeveoon, Bonquisha,Tanisha, T’a nay, Deshaun, Tayshaun, Deron, Rau’shee, Raynell, Deontay, Taraje, Jozy, Kerron, Hyleas, Chaunte, Bershawn, Lashawn, Sanya, Trevell, Sheena, Ogonna, Dremiel , and many others.
“it is largely and profoundly the legacy of African-Americans,” writes Eliza Dinwiddie-Boyd in her baby-naming book “Proud Heritage.” Shalondra and Shaday, Jenneta and Jonelle, Michandra and Milika – in some parts of the country today, nearly a third of African-American girls are given a name belonging to no one else in the state (boys’ names tend to be somewhat more conservative).
Why is this so ?