In The Ballad Of Halo Jones, the alien Proximen have to buy words to add to their names, making name length an indicator of class. A Proximan in a position of political power, for instance, is called 'Procurator Bandaged Ice That Stampedes Inexpensively Through A Scribbled Morning Waving Necessary Ankles', whereas one encountered by the heroine at a bus stop tells her, "Name is Snivelling. When can afford second word in name, will be Snivelling Earthquake."
Cable: Cable's name is Nathan Dayspring Charles Christopher Summers, sometimes appended with Askani'Son or Soldier X—leading Deadpool to add things like "Priscilla" and "Gesundheit" to the middle.
This is actually a fusion of two different "full" names (each rather long in its own right) that Cable went by at different points in his life: his birth name, Nathan Charles Christopher Summers and the name he was raised under in the distant future, Nathaniel Dayspring Askani'Son.
In the X-Wing Series, Plourr Illo's true name is revealed to be Isplorrdacartha Estillo. All of the royal family of her homeworld, Eiattu VI, had names like that - her father was Uthorrferrell Cartha, her brother was Harrandatha Estillo. Other nobles, including her cousin and fiance Rial Pernon, have easier to spell names.