Salman al-Farsi, a companion of Persian origin, proposed the innovative defensive tactic of digging a trench to protect Medina from the invading confederate forces. This strategy was successfully adopted by the Muslims, effectively neutralizing the enemy's superior cavalry and leading to a stalemate that forced the attackers to retreat.

Qutbuddin Aibak, a former general of Muhammad Ghori, established the Mamluk dynasty in 1206. He is widely considered the first independent Muslim ruler of the Delhi Sultanate, marking the beginning of continuous Muslim rule in northern India after the Ghorid conquests.

Al-Zahrawi, known as Abulcasis in the Latin West, was a medieval Andalusian physician and surgeon. He is widely regarded as the 'father of modern surgery' for his comprehensive medical encyclopedia, 'Kitab al-Tasrif', which detailed surgical procedures and instruments. His work was highly influential in both the Islamic world and Europe for centuries, serving as a standard medical text in universities throughout the Middle Ages and the Renaissance.

Qutb ud-Din Aibak, a former general of Muhammad Ghori, established the Slave dynasty in 1206 following the death of his master. As the first Sultan of the Delhi Sultanate, he laid the groundwork for Islamic rule in northern India. His reign was relatively short, but he is credited with initiating the construction of major architectural landmarks, including the Qutb Minar, which remains a symbol of the era.

Abu Abdullah al-Battani was a preeminent astronomer and mathematician during the Islamic Golden Age. His work significantly refined the calculation of the solar year and the precession of the equinoxes. His astronomical tables and mathematical treatises, particularly his contributions to trigonometry, were highly influential in both the Islamic world and medieval Europe, where his works were translated and studied for centuries by later scientists.

Al-Biruni was a polymath who made significant contributions to various scientific fields, including physics and astronomy. He conducted observations regarding the nature of light and sound, noting that light travels significantly faster than sound. His empirical approach to these physical phenomena was highly advanced for his time, solidifying his reputation as a pioneering scientist.

Ibn Battuta was a famous Moroccan explorer who traveled extensively across the Islamic world and beyond. He arrived in India during the 14th century and served in the court of Muhammad bin Tughluq for several years before continuing his journey to China. His travelogues provide significant historical insights into the Delhi Sultanate.

Nasir al-Din al-Tusi was a polymath who made significant contributions to mathematics and astronomy. He developed the 'Tusi couple,' a geometric construction used to explain planetary motion, and conducted extensive observations that refined the understanding of lunar and planetary mechanics during the Islamic Golden Age.

Shah Waliullah, a prominent Islamic scholar, is historically noted for writing to Ahmad Shah Abdali, the ruler of the Durrani Empire. He requested Abdali's intervention to address the political instability in India and to curb the growing dominance of the Maratha Empire, which culminated in the decisive Third Battle of Panipat in 1761.

Sir Syed Ahmad Khan, a prominent 19th-century Indian Muslim reformer and educationist, was born in Delhi on 17 October 1817. He is best remembered for establishing the Muhammadan Anglo-Oriental College, which later became the Aligarh Muslim University.