The colony of Hartmann, named after immigrant leader Karl Hartmann, was settled by Volga Germans on 16 March 1879. It is also known by the name of Quero-Quero.
The following Volga German families are known to have settled in Hartmann:
Albach from Beauregard
Arnold
Bauer
Eurich from Reinwald
Ghommes
Hartmann from Reinwald
Hopp from Reinwald
Hornus from Reinwald
Jurk from Reinwald
Knaup
Kuhn
Lederer from Reinwald
Müller
Neuwirth from Reinwald
Rosenberg
Ruppel from Reinwald
Schweigert
Wagner
Weigand from Friedenfeld
- Schwab, Carlos Alberto. Resumo Histórico e Genealogia dos Alemães do Volga. Ponta Grossa, Brazil: C.A. Schwab, 1997.
House of Johann Georg Hartmann (1858-1946), son of immigration leader Karl Hartmann.
Colony of Quero-Quero, Brazil (1923).
Source: Welington Hartmann.
Lutheran Church in Quero-Quero.
Source: Welington Hartmann.