Hakeem Noor-ud-Din
Al-Hājj Mawlāna Hāfiz Hakīm Noor-ud-Din (Arabic: الحاج مولانا حافظ حکیم نور الدین) (c. 1841 - March 13, 1914) was Khalifatul Masih I, head of the Ahmadiyya Muslim Community, he was a renowned physician, and was also an active writer, theologian, and scholar of Arabic and Hebrew. He was a companion of Mirza Ghulam Ahmad and was elected as his first successor on May 27, 1908, a day after his death.
Royal Physician to the Maharaja of Jammu and Kashmir for many years, his extensive travels included a long stay in the cities of Mecca and Medina in pursuit of religious knowledge. His lectures on Quranic exegesis and Hadith were one of the main attractions for visitors to Qadian. He also wrote rebuttals to objections and criticisms raised by Christians and the Arya Samaj against Islam. Mawlana Noor-ud-Din was the first person to take bay'ah (oath of allegiance) to Mirza Ghulam Ahmad when he claimed to be divinely appointed to take the pledge and establish a community on March 23, 1889. After Mirza Ghulam Ahmad's death, Hakeem Noor-ud-Din was unanimously voted as his successor and is credited for maintaining unity within the Ahmadiyya Community after the death of its founder.
Hakeem Noor-ud-Din was the youngest of seven brothers and two sisters and the 34th direct lineal male descent of Umar Ibn al-Khattab, the second caliph of Islam . His family had a tradition of completely memorizing the Quran.
Read more about Hakeem Noor-ud-Din: Early Years and Education, Further Learning and Travels, Royal Physician, Introduction To Mirza Ghulam Ahmad, Caliphate, Marriages and Children