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.
Sugrue
Sugŕue is an Irish surname, which is an anglicized form of the old Gaelic name Ó Siochfhrádha, meaning "descendant of Siochfhrádh", or Ó Siochŕu the modern Gaelic equivalent of Ó Sugŕue, which in turn is a Gaelic version of the old norse German given first name Siegfried, meaning "victory and peace".