Explanation:

- Raja Ram Mohan Roy: He founded the Brahmo Samaj in 1828 in Calcutta. This movement sought to reform and modernize Indian society and religion with an emphasis on monotheism, rationalism, and humanism.

- Swami Vivekananda: Known for introducing Indian philosophies of Vedanta and Yoga to the Western world. He was a key figure in the revival of Hinduism in India, but not the founder of the Brahmo Samaj.

- Swami Dayanand Saraswati: He was the founder of the Arya Samaj, another reform movement, and not related to the founding of the Brahmo Samaj.

- Ishwar Chandra Vidyasagar: A prominent social reformer in Bengal who championed women's rights and education but was not involved in founding the Brahmo Samaj.