Why do people named Enrique called Kiki?

I found online that kiki is the nickname for any name with a K sound. So names with K, or C’s that sound like k or Q. Like Angelique, or Dominique or Nicole or Katrina. Though Nikk, or Niki is more common for names like Angelique, Dominique, or Nicole.

Might have come from when they were children. Either Enrique or a younger sibling couldn’t properly say the name. They heard the “k” sound and pronounced the name “Kiki”. And it stuck.

My brother in law’s name is Enrique. I’ve known Enrique for 35 years. I’ve heard people call him Henry but never heard him called “Kiki”.

“Kike” is not an appropriate word, just FYI.

This reminds me of “In My Feelings – Kiki do you love me” by Drake.

https://www.youtube.com/watch?v=3WSgJCYIewM

Just like Liz and Betty are good for Elizabeth. And a cook named Ignacio invented Nachos.

Jack for John makes no sense, though, what’s the deal with that?