"Blend of De and Kayla"
The name Dekayla is commonly a female name from the "English" origin.
Dekayla reads as a modern American formation that pairs the name element De, familiar from names such as DeShawn and Deandra, with Kayla. The De element functions here as a decorative prefix rather than as a word with a meaning of its own, so the name does not carry a separate lexical sense beyond Kayla.
The pronunciation of Dekayla is dih-KAY-luh.