@foone @imbl throw an O' in there (with capital afterwards) for good measure to place yourself squarely among the ranks of the absolutely bog-standard centuries old name traditions that are regularly used in multiple cultures but somehow kryptonite for text handling systems.

I think the funniest might be the literal missing-character box codepoint. Everyone will assume that it's actually some obscure glyph their system can't handle, and whenever you write it out on paper on a form that uses little boxes for each letter, you'll just be drawing a rectangle inside the rectangle and whoever has to enter the data will be stumped.