The Congregation of the Sons of the Most Holy Redeemer, commonly known as the Transalpine Redemptorists or The Sons, are a religious institute of the Catholic Church canonically erected in the Roman Catholic Diocese of Aberdeen and based on Papa Stronsay in the Orkney Islands, Scotland, as well as in the city of Christchurch, New Zealand. They were formed in 1988 as a traditionalist offshoot of the Redemptorists, following a monastic rule based on that of Alphonsus Liguori, and was later formally erected as a religious institute in 2012.

Papa Stronsay is a small island in Orkney, Scotland, lying north east of Stronsay. It is 74 hectares in size, and 13 metres (43 ft) above sea level at its highest point. After being largely abandoned, the island was bought at the end of the 20th century by traditionalist Catholic monks of the Sons of the Most Holy Redeemer, who operate a monastery and farm there.