You can and should read, understand and refer to the naming standards for European Aristocrats before creating or editing these profiles. They are here: http://www.wikitree.com/wiki/Name_Fields_for_European_Aristocrats
Item 6.a. states: PREFIXES IN LAST NAME AT BIRTH FIELD:
1. Names like St John: "St" is a prefix which stays with the surname; that is, "St John" goes in the LNAB field, and St is not dropped nor separated out into the prefix field. Do not put a period after the St and do not spell out the word Saint.
2. The common ‘de’, ‘du’, ‘le’, ‘la’, ‘de la’, ‘von’, ‘van’ before a surname does not go in the LNAB field; it goes with the surname in the Current Last Name field while the surname, ONE word, goes in the LNAB. Example: Last name at birth: "Villefort", Current Last Name: "de Villefort". The exception to this is de Vere. Members of this family should have both words in the LNAB field.
3. Names that include ‘Fitz’: Fitz- names should be written with mid-caps, that is, a capital letter for the father's name. For example, write FitzAlan, FitzGeoffrey, FitzGerald, etc. This is the same pattern as used in names with Mac-: MacMurray, MacDonald, etc. Do not include a space.
As to the gedcom import, this should not have been allowed.
Darlene, Co-Leader, European Aristocrats Project