Lorenzo de Arrau

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Lorenzo de Arrau (1735 - 1781) was a Spanish engineer sent to Chile by King Carlos III of Spain.

He arrived to Chile around 1768, apparently accompanying Ambrosio O'Higgins, Marquis of Osorno, Viceroy of Perú and father of Bernardo O'Higgins, the Father of the Chilean Independence. He married Isabel de Santa María y Baeza, and they had six children: Juan (single), Pedro Juan (ancestor of pianist Claudio Arrau), Clara, Juana, Cruz, Manuela Bárbara (nun).

His son Pedro Juan married Carmen Daroch, a descendant of Reverend John Darroch and Elizabeth Campbell.

The origins of the Arraus can be found in the Basque Country, and further, in France.

His descendant was the famous pianist Claudio Arrau.