You’re right. I am aware of some very old ladies (most have passed away) named Yolanda.
But this particular Yolanda is probably under 50 (police retire early) and ALL of the under 50 Yolandas I have heard of are black.
Who knows. It used to be common to name kids after parents, grandparents, and other ancestors. I was. There might be a family history of the name.
Names go through popular cycles. There were a couple of movies featuring the name in the early to mid 20th century - something like that often fuels the popularity of names.
The name seems to have begun rising in popularity around 1950, until its greatest popularity in the 1970s. Since then it has greatly declined.
I knew a MexicanAmerican with that name.. She should be about 52 about now.