I study Mathematics and Statistics and one of the most common symbols we tend to write is μ which obviously is the lower case 'Mu'. It is one of the easiest symbols to learn when first encountered since it is so similar to u, both in writing and in the way it is pronounced. After all, 'Mu' and 'u' both have very similar pronunciations.
I have absolutely no experience in Linguistics, but I definitely know that the symbol W has its origins in Latin. Is there a similar connection in this case?