What was the nickname of the princess that signed the Lei Áurea law?
Isabel, Princess Imperial of Brazil Dona Isabel (English: Isabella; 29 July 1846 – 14 November 1921), nicknamed "the Redemptress", was the heiress presumptive to the throne of the Empire of Brazil, bearing the title of Princess Imperial. She also served as the Empire's regent on three occasions.
Orla (name) Órla, Órlaith, Orla or Orlagh (pronounced OR-lah) is a female given name of Irish origin. The root format of the name is "Órfhlaith" interpretable as "golden princess" as it combines the Gaelic elements "ór": gold, and "fhlaith" literally prince, its full feminine form being "banfhlaith".