The Brahmo Samaj was a prominent reform movement in India during the 19th century, with a focus on monotheistic beliefs and social reform. This movement was led by several notable figures and leaders who played a crucial role in shaping the ideology and impact of the Brahmo Samaj.

One of the most influential leaders of the Brahmo Samaj was Raja Ram Mohan Roy, often referred to as the "Father of the Indian Renaissance." He was a social reformer, scholar, and advocate for women's rights. Roy was a staunch believer in monotheism and worked towards eradicating the prevalent practices of idol worship and polytheism. He also advocated for the abolition of sati, child marriage, and other social evils. His teachings and writings had a profound impact on the Brahmo Samaj and its followers.

Another prominent figure in the Brahmo Samaj was Debendranath Tagore, who is considered the founder of the movement. He was a philosopher, poet, and social reformer who emphasized the importance of rational thinking and education. Tagore led the Brahmo Samaj after Raja Ram Mohan Roy's death and continued to spread its message of monotheism and social reform.

Keshab Chandra Sen was another influential leader of the Brahmo Samaj, known for his charismatic personality and oratory skills. He was a strong advocate for women's rights and played a crucial role in the formation of the Brahmo Samaj's women's wing. Sen also worked towards the upliftment of the lower castes and the education of women.

Other notable figures in the Brahmo Samaj include Akshay Kumar Datta, who was a prolific writer and social reformer, and Anandamohan Bose, who was a lawyer and advocate for women's education. These leaders, along with many others, worked tirelessly to spread the message of the Brahmo Samaj and bring about social change in Indian society.

In conclusion, the Brahmo Samaj had many notable figures and leaders who played a significant role in shaping the movement and its impact on society. Their teachings and efforts towards social reform, monotheistic beliefs, and education continue to inspire and influence people even today. The legacy of the Brahmo Samaj and its leaders will always be remembered as a crucial part of India's reform and modernization.