Re:Username ending with MIME type format is not allowed
by Pinus on Wednesday September 15, 2021 @12:30PM
(#28541178)
The confusing bit is that the rules about middle names and double surnames have changed at least twice in... my lifetime, which is becoming much longer than I care to think about. :-) I didn't do a very good job of conveying that in my comment.
Typical Portuguese names have around 5 names, two first names and three surnames from both parents.
In fact your description fits quite well how they are used in Portugal, plus a few other nuances.