Taha Najmuddin (Arabic: طٰه نجْمُ الدِّين) is the second son of Mufaddal Saifuddin,[1][2] the 53rd Da'i al-Mutlaq[3] of the Dawoodi Bohras and the grandson of Mohammed Burhanuddin.

His primary education took place in Saifee Mahal, Mumbai under personal tutelage of his grandfather, Mohammed Burhanuddin and his father, Mufaddal Saifuddin.

He attended MSB Educational Institute and graduated as Al-Faqih al-Jayyid (MA) in Islamic Fatemi Literature (Arabic: الفقيه الجيد) from Aljamea-tus-Saifiyah in 1996.

Najmuddin's ancestors include Mir Mahamad Ali, Fakhr al-Din Shaheed, Abd al-Qadir Hakimuddin, Khanji Pheer and Syedi Lukman who were direct descendants of Ja'far al-Sadiq.

Taha Najmuddin regularly accompanies Mufaddal Saifuddin on his travels and oversees various socio-economic initiatives of the Dawoodi Bohra community.