Æ/æ is a letter found in Icelandic, norwegian, and other scandinavian languages. It originated from Latin and makes different sounds depending on what language is being spoken.

Icelandic and Latin: pronounced like the english word 'eye'

Norwegian: like english 'a' in 'cat'

Anglo Saxon: like english 'a' in 'cat'

Character used in Latin a lot, and still is used in the archaic spellings of some words today. Most of the time, if you spell a word with æ when it doesn't need to be spelled that way, people think you're an uppity bastard.

Used when the last letter of a word is 'a' which is going to be suffixed by 'ed' or any suffixes beginning with 'e'.