Me too Squoosh. There is even a reasonably well-known actor with the same surname and still the different pronunciations are incredible. It's a clunky Anglo Saxon surname. My first name is Irish
The lesson is, don't bother anticipating how others will mangle your name. Use whatever name you like, because no matter what the origin or spelling or pronunciation there are people who are not very bright will get it wrong.
All-duss, emphasis on the first syllable, is how I have always heard it pronounced.