[seszett]

> What is on your passport then?

See my other comment on Vietnamese names, actually if you have a Belgian passport and a Vietnamese name, your actual given name (the third part for women with the "Thi" middle name) is not shown on your passport or identity card, only the first letter of it.

For French people who have three given names it's the same, although the two last ones are generally not used (you could say they're little endian compared to Vietnamese big endian names, I suppose) so it's not as important.

I have no idea why, and Belgium is the only country I know that does that, but it means your passport name is absolutely not your canonical full name.