RATAN SINGH, BHĀĪ (d.1943), alias Santā Siṅgh, alias Īshar Siṅgh, son of Nihāl Siṅgh, of Rāipur Doābā, in Jalandhar district, served in the Indian army before migrating to Fiji Islands in 1914 from where he moved to Vancouver. While in Vancouver, he was drawn into the Ghadr movement. He was nominated a member of the Shore Committee to help the Komagata Maru passengers land on Canadian soil. Ratan Siṅgh travelled widely in Europe and Latin America enlisting support for the Ghadr party. He visited Moscow twice, first with Bhāī Santokh Siṅgh in 1923 and then alone. In Moscow, he met Lenin and other Russian leaders and attended the Fourth Congress of the Communist International. He carried the Communist International message to many European countries and visited India incognito several times. He also helped with funds collected abroad the Punjabi magazine, Kirtī, launched by Bhāī Santokh Siṅgh from Amritsar in February 1926.

         Ratan Siṅgh died in a hospital in Italy in September 1943.