Antônio Luis von Hoonholtz, Baron of Teffé (9 May 1837 – 6 February 1931), was a Brazilian admiral, politician, explorer and geographer.

During the Paraguayan War, commanding the gunboat Araguari [pt],[1] he was one of the heroes of the bombardment of Corrientes, occupied by the defenders of Paraguay.

Then, on 11 June 1865, he won the officer's medal of the Imperial Order of the Southern Cross for his actions in the naval battle of the Riachuelo.

On 13 and 14 July 1865, in new battles, he managed to set fire to the Paraguayan steamer Paraguarí [pt], which had run aground.

[3] Promoted to rear-admiral, he led the Brazilian mission that observed the transit of Venus in front of the sun at Saint Thomas in the Caribbean Sea and at Punta Arenas in Patagonia in 1882.