succession of kings, and the like, the cardinal numeral is rather used than the ordinal; as, Seoirse an tri, George the third; rather than Seoirse an treas. 1872...
this phraseology, unless with unus, which they frequently joined with an ordinal numeral. Thus, "twenty-third," is vigesimus tertius: "twenty-first," vigesimus...
&c. but from the Ordinal Numbers, first, second, third, &c. which last have the Particle ly, joined to them only up to the number 12, or twelfthly, but...