[wenc]

Yes I agree this is common for folks who live in the country long term. But I wonder, for tourists though? And a tourist going to a country with a non-Indo European language?

It’s hard for me to imagine an Aloysius adopting a Chinese name while visiting China for a few days say. Would he use a derived nickname like Loy? I wonder.

[dagw]

I don't make up an entirely new name, but I do mispronounce my own name differently in different countries to make life easier for everybody. I also know several person that either uses their middle names or shortened versions of their 'real' name when traveling in English speaking countries.