Sui generis
A similar case that led to the use of the label "sui generis" is the relationship of New Caledonia relative to France, because the legal status of New Caledonia can aptly be said to lie somewhere between a French overseas collectivity and a sovereign nation. Although other examples of such status for other dependent or disputed territories may exist, this arrangement is unique within the French realm.
Prince du sang
A prince du sang (, Prince of the Blood) is a person legitimately descended in dynastic line from any of a realm's hereditary monarchs. Historically, the term has been used to refer to men and women descended in the male line from a sovereign, although as absolute primogeniture has become more common in monarchies, those with succession rights through female descent are more likely than in the past to be accorded the princely title (e.g., Belgian Royal Family).