My question is not about the general usage of a/an, so, I believe, it is not a duplicate one. It is specifically about the title of the dictionary An Universal Etymological English Dictionary compiled by Nathan Bailey.
Nathan Biley's dictionary is said to be first published in London in 1721. The etymology of the word universal (as per the etymonline.com) shows that the word has been in use centuries before the publication of the dictionary.
Now, the questions are:
Why is an used before the word universal /juːnɪˈvəːs(ə)l/ which begins with a consonant sound?
Has the word universal ever been pronounced with an initial vowel sound as /uːnɪˈvəːs(ə)l/?