From Buddhism
The Barmakid family - originally the guardians of the great Buddhist shrine near Balkh, upon conversion they became "the greatest family" in the early Abbasid caliphate.
Mahmud Ghazan - seventh ruler of the Ilkhanate.
Muhammad Khodabandeh - eighth Ilkhaid dynasty ruler in Iran from 1304 to 1316.
Mubarak Shah - head of the ulus of the Chagatai Khanate (1252–1260, March-September 1266).
Tarmashirin - Khan of the Chagatai Khanate following Duwa Timur.
Hussein Ye - An Islamic scholar of Chinese descent whose lectures are frequently aired on Peace TV.
From Hinduism
Parameswara (sultan) the Palembang prince of Hindu descent.Parameswara - Malay prince of Palembang Hindu descent from Srivijaya that founded the Sultanate of Malacca around 1402.
Sumita Devi - Bengali actress and filmmaker.
Vilayil Fazila - popular Mappila songs singer from Kerala.[citation needed]
Murshid Quli Khan - the Mughal governor of Bengal.
Malik Kafur - Indian military general.
Abdul Wahid Pedersen - Danish cleric.
Cheraman Perumal - The first Indian king to accept Islam
Sahaj Ram Sapru - the grandfather of the British-Indian Muslim Philosopher, Sir Dr. Muhammad Iqbal, who was an official in Kashmir during the administration of the Afghan Governor Azim Khan. [174]
Kamala Suraiyya (formerly Kamala Das) - Anglo-Malayalam writer[175]
Sharmila Tagore (Begum Ayesha Sultana) - Bollywood film actress.[176]
Megat Iskandar Shah - first Muslim ruler of Malacca.
Kabir Suman- Modern Bengali singer & songwriter officially converted to Islam from Hinduism in 2000.
Tansen - Notable musician and poet.
A.R. Rahman (stands for Allah Rakha Rahman) - Modern South Indian singer ,songwriter & Oscar winner officially converted to Islam from Hinduism.
From Sikhism
Ubaidullah Sindhi - religious leader and political activist.
From Paganism
See also: List of Sahaba
Berke - grandson of Genghis Khan and leader of the Golden Horde who was the first Mongol ruler to establish Islam in a Mongol state.
David Myatt - from Paganism, former Neo-Nazi-activist
Negudar - Mongol general and noyan
Nogai Khan - Mongol general and great-grandson of Genghis Khan.
Samori Ture - founder of the Wassoulou Empire who resisted French rule in West Africa.
Sultan Satuq Bughra Khan - 9th century Uyghur ruler who was one of the first Turks to convert to Islam.
Tuda Mengu - Mongol leader of the Golden Horde
West African leader Samori Ture who fought European colonialismTughlugh Timur - the Khan of Moghulistan.
From Buddhism
The Barmakid family - originally the guardians of the great Buddhist shrine near Balkh, upon conversion they became "the greatest family" in the early Abbasid caliphate.
Mahmud Ghazan - seventh ruler of the Ilkhanate.
Muhammad Khodabandeh - eighth Ilkhaid dynasty ruler in Iran from 1304 to 1316.
Mubarak Shah - head of the ulus of the Chagatai Khanate (1252–1260, March-September 1266).
Tarmashirin - Khan of the Chagatai Khanate following Duwa Timur.
Hussein Ye - An Islamic scholar of Chinese descent whose lectures are frequently aired on Peace TV.
From Hinduism
Parameswara (sultan) the Palembang prince of Hindu descent.Parameswara - Malay prince of Palembang Hindu descent from Srivijaya that founded the Sultanate of Malacca around 1402.
Sumita Devi - Bengali actress and filmmaker.
Vilayil Fazila - popular Mappila songs singer from Kerala.[citation needed]
Murshid Quli Khan - the Mughal governor of Bengal.
Malik Kafur - Indian military general.
Abdul Wahid Pedersen - Danish cleric.
Cheraman Perumal - The first Indian king to accept Islam
Sahaj Ram Sapru - the grandfather of the British-Indian Muslim Philosopher, Sir Dr. Muhammad Iqbal, who was an official in Kashmir during the administration of the Afghan Governor Azim Khan. [174]
Kamala Suraiyya (formerly Kamala Das) - Anglo-Malayalam writer[175]
Sharmila Tagore (Begum Ayesha Sultana) - Bollywood film actress.[176]
Megat Iskandar Shah - first Muslim ruler of Malacca.
Kabir Suman- Modern Bengali singer & songwriter officially converted to Islam from Hinduism in 2000.
Tansen - Notable musician and poet.
A.R. Rahman (stands for Allah Rakha Rahman) - Modern South Indian singer ,songwriter & Oscar winner officially converted to Islam from Hinduism.
From Sikhism
Ubaidullah Sindhi - religious leader and political activist.
From Paganism
See also: List of Sahaba
Berke - grandson of Genghis Khan and leader of the Golden Horde who was the first Mongol ruler to establish Islam in a Mongol state.
David Myatt - from Paganism, former Neo-Nazi-activist
Negudar - Mongol general and noyan
Nogai Khan - Mongol general and great-grandson of Genghis Khan.
Samori Ture - founder of the Wassoulou Empire who resisted French rule in West Africa.
Sultan Satuq Bughra Khan - 9th century Uyghur ruler who was one of the first Turks to convert to Islam.
Tuda Mengu - Mongol leader of the Golden Horde
West African leader Samori Ture who fought European colonialismTughlugh Timur - the Khan of Moghulistan.
I got this from wekipedia
http://en.wikipedia.org/wiki/List_of_converts_to_Islam