Right. So your system for writing the names is different, and what you call other prenames we would call middle names, but in practice it's the same system.
Isn't the surname also normally written in uppercase and sometimes given first as well? I remember doing this in my year in France. You also mentioned a seperate "middle name" earlier in thread which was explictly not a given name. Are there any examples you know of off the top of your head?
In practice it isn't much different, but in spirit it is different because all pre-names are pre-names (they are all registered in the same line in any form). In a French very complete form you would have, commonly, a box for "title", always, another for "pre-name" (where you put them all), very rarely, another for "particle" (I've only found that in the Normal National School) and, always, another for "family name". All pre-names,
are pre-names (are given names) and none of them are separated (as being middle names).
I presume it work approximatively the same in other European continental civilizations, such as the German one (all
Vornamen are part of the same category: Johannes Chrysostomus Wolfgangus Theophilus are all the (latin) pre-names of Mozart, among which he use two of them: Wolfgangus Theophilus, "Wolfgang Amadeus").
On the contrary, in an American full form, there would be a box for the title, another for the first name, another for the middle name and a last one for the family name. Which make it clear that the middle name is separated from the first name. I think that the middle name concept is more or less specific to the English speaking culture (especially in America).
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In France, the family name is normally written in small capitals in bibliographical references and in signatures (for the sole signatures or for other signatures than the main one when there is many signatures) and in grand capitals for the main signature among many signatures (with small capitals for the pre-name of the main signature and lower cases for others signatures' pre-names).
The family name is normally written, without the particle, before the pre-name in bibliographical reference lists (because you search for names before searching pre-names):
B
ONALD,
Louis-Gabriel-Ambroise, vicomte de,
Théorie du pouvoir politique et religieux, 1796.
Outside those two points, using upper case for names and ranking it before pre-name is a common (and faulty) administrative use (for computer use comfort).