The story
Aeronorte was founded on December 30, 1949. In December 1950 Aeronorte rented a Junkers Ju 52 from VASP, and initiated flights from São Luís to Belém, to Carolina, and to Fortaleza, Recife and Salvador da Bahia.
It was acquired by Aerovias Brasil on January 15, 1953, but continued to operate as an autonomous unit in partnership with its new owner. When Real Transportes Aéreos acquired Aerovias Brasil in 1954 Aeronorte continued to operate with some autonomy as part of the consortium. This arrangement was dissolved in 1961 when Varig bought and integrated Aerovias Brasil, Real and its subsidiaries.
From Wikipedia’s article on Aeronorte, shared under CC BY-SA 4.0.3