Seems to be like “Eh-dew”, “Eh-dee”, “Eh-dich”, so eh- or uh- for the Y at the start. Welsh IPA guide on wiktionary says Y at the start is like the a at the start of “about”, when it’s not either a single-syllable or in the last syllable of a word, in which case it’s an “eee” sound, like the end of “happy”.