Allard Lambertus Oosterhuis (19 July 1902, in Delfzijl – 1 January 1967, in Killiney) was a Dutch resistance hero during World War II.
Thanks to his work as a cruiser, with his ships Cascade and Libelle, he was able to put up a smuggling route for the resistance between the harbour of Delfzijl and Stockholm.
Due to these activities many people and materials left occupied Netherlands, and radio transmitters, photos from the Dutch Queen and money for the resistance were shipped into the country.
After the war, Oosterhuis, for health reasons, quit his profession as a doctor and became a cruiser with his ship MS Stientje Mensinga, a rebuilt landing vehicle from 1943.
In 1952, he settled permanently in Ireland and received the Bronze Cross for bravery against the occupier during World War II.