Perhaps she will wear a Lannoy et. al. tiara, but the tiara you mention which was a wedding present to her fiance's grandmother would be a wonderful gift to her - it's modern and streamlined yet elegant and feminine. It's not really part of the historic family collection and hasn't been worn much so it would be "hers". She'll probably be wearing one often once married.
--Previous Message-- : I hope she will wear the Belgian tiara present : of the belgian Nobility to Josephine : Charlotte which escape from the Auction in : Paris. : Years ago the son of the late Count Everard : de Limbourg Stirum and HRH Princess Hélène : d’ Orleans married a Countess de Lannoy : (first cousin ) and she wore a de Lannoy : small tiara. : : --Previous Message-- : It can be a Luxembourg diadem. Maybe the : family De Lannoy (father) or the family : Della Faille de Leverghem (mother) also have : a heirloom. : : :