SQL spelled S Q L and for convenience pronounced SEQUEL. Just as BASIC is pronounced as the five-letter word but really means Beginner's All-purpose Sequential Instruction Code. Just as FORTRAN stands for Formula Translation. Just as COBOL means Common Business Oriented Language. Just as ALGOL is the Algorithmic Language. But NOBODY pronounces anything like the original long name any more.
The only modern ones that are correct are ADA and PASCAL (named after mathematicians) whose names were Ada Lovelace and Blaise Pascal, and of course, C, which got its name because A and B versions didn't work out so well. (No, not kidding.)