It is named after Maria Leopoldina, archduchess of Austria and Empress of Brazil, consort of Emperor Pedro I.
While traveling to Minas Gerais along this route, Emperor Pedro I found the region's climate pleasant, while staying at the farm of Correia, a Catholic priest.
Through her mother, Princess Christine is a descendant in the fifth generation of King John VI of Portugal and is a great-grand niece of Brazil's first emperor, Pedro I of Brazil.
The highway was named after Emperor Dom Pedro I, partly because it was inaugurated in 1972 and served to commemorate 150 years of Independence.
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Domitila (or Domitília) de Castro do Canto e Melo (São Paulo, December 27, 1797 — São Paulo, November 3, 1867), 1st Viscountess with designation as a Grandee, then 1st Marchioness of Santos, was a Brazilian noblewoman and the long-term mistress and favorite of Emperor Dom Pedro I.
The town was founded on 12 October 1821, under the name of San Pedro del Durazno, as a homage to Brazilian Emperor Pedro I, at a time when the territory of present-day Uruguay had been annexed to Brazil as the Cisplatine Province.
financed an expedition to Brazil on the occasion of the wedding of his daughter Archduchess Leopoldina to the Portuguese crown prince, Dom Pedro of Alcantara (who was later to become Emperor of Brazil).
In 1824 Neumann took part in the negotiations between Portugal and Brazil, as a result of King John VI of Portugal and his son Emperor Pedro I of Brazil were reconciled.