The Encyclopædia Brittanica still uses the symbol “æ”. However, I still hear everyone pronounce it as “Encyclo pee dia”, when their spelling suggests more along the lines of “Encyclo pah dia” or “encyclo pay dia”. In a more general sense, should æ or Æ always be pronounced as a long e sound? When I see it used, it is in dæmon, æther, or æon.
The wikipedia page makes it clear that they should be pronounced with another sound along the lines of ah or eh… confusing because I want to pronounce it as “ai” or “ay”. Given the name “Aion” as a recent videogame, and the common pronunciation of a CS mailer-daemon as “Daymon”, clearly others behave the same way.
The problem lies in that æ used to be pronounced as ah/eh, and now seems to be pronounced as ay. Encyclopædia is the only exception… being pronounced as ee?
How do I pronounce it when seen in English? ee, ay, or ah/eh?
You have to distinguish English vowels from English orthography. There are between twelve and fifteen distinct vowels in English, depending on your dialect, but there are only 5 vowel letters in the orthography. This causes no end of problems.
The letter æ was used in Old English to represent the vowel that’s pronounced in Modern English ash, fan, happy, and last: /æ/. Mostly we now spell that vowel with the letter a, because of the Great Vowel Shift.
When æ appears in writing Modern English, it’s meant to be a typographic variant of ae, and is pronounced the same as that sequence of vowel letters would be. So Encyclopaedia or Encyclopædia, no difference.