Brahmo-Somaj (i.e. church of God), a secession from traditional Hinduism, originated in 1830 by Rammohun Roy, and developed by Chunder Sen; founded on theistic, or rather monotheistic, i.e. unitarian, principles, and the rational ideas and philosophy of Europe, as well as a profession of a sense of the brotherhood of man no less than the unity of God.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Brahminism * Brahms, Johannes