Spanish noble titles follow a clear hierarchy and tradition when listed. The primary factor determining the order of titles is their association with a Grandee or GE, not the age or creation date of the title. Titles with Grandee status always take precedence, regardless of rank (e.g., Duke, Marquess, Count). All Grandees are styled "The Most Excellent," while non-Grandee titles carry "The Most Illustrious."
For example, in the case of the 14th Duke of Abrantes GE, his primary title is listed first because it is a Dukedom with Grandee status. His next title, 6th Marquess of Duero GE, follows as it also carries Grandee status. Non-Grandee titles are listed afterward, in descending order of rank (e.g., Marquess, Count, Viscount).
The exception of the Dukedom of Fernandina, which lacks Grandee status, is rare. In general, Dukedoms are almost always Grandees, so a noble would not be styled as "16th Count of X" before "5th Duke of X" unless the Count title carried Grandee status and the Dukedom did not, which is highly unlikely. The hierarchy is:
- Grandee titles first, in order of rank (Duke, Marquess, Count, etc.).
- Non-Grandee titles next, in order of rank.
- Age of the title’s creation is irrelevant to this order.