Kattalin Aguirre, born as Catherine Lamothe (Sare, 28 August 1897 – Ciboure, 22 July 1992), was a Basque member of the French Resistance during the Second World War.

She played a key role harbouring and assisting Allied soldiers (mostly airmen) and members of the resistance in their attempt to escape occupied France and Belgium.

Aguirre also worked for the Comet Line, headed by Elvire de Greef in southern France, sheltering fleeing airmen, nourishing them and bringing them safely to their mountain guide Florentino Goikoetxea.

A pass through the Pyrenees allowed them to walk to Spain, which was neutral in the war, where they would be picked up by Michael Creswell, a diplomat with the British Embassy in Madrid.

He collected secret intel from occupied France to pass the information on to the Nana network, an organisation financed by the US intelligence agency OSS in Madrid.