Dante Tessieri, who was from Cecina, left Italy for political reasons in the late 1890s to Brazil and moved to Argentina about 1900 after the death of his first son with Aida Guaimonti. He had three children in his new homeland: Sara, Iris, and Carlos after Nemo, my grandfather, was born in Brazil in 1899.
Dante Tessieri was a mathematician and apparently served in the Italian Navy.
Please get in touch if he was: [email protected]