Complex sentence: Unlike majority of the other Bengali Kayasthas who were'Shaktos', the Rays were'Vaishnavas'-they had acquired the name'Ray' (originally'Rai') from the Mughals.
Split into simpler sentences: Unlike majority of the other Bengali Kayasthas who were'Shaktos', the Rays were'Vaishnavas'. They had acquired the name'Ray' (originally'Rai') from the Mughals.