Ad-eh-la
The emphasis is on the first syllable, "Ad." The "e" in the second syllable is short, like the "e" in "bed."
However, depending on the language or region, there can be slight variations:
* Spanish: "Ah-deh-lah" (with a stronger "ah" sound on the first syllable)
* Italian: "Ah-day-lah" (similar to Spanish, but with a slightly different vowel sound on the second syllable)
Ultimately, the best way to know how someone pronounces their name is to ask them.