AJIT SINGH, SAHIBZADA (1687 - 1705), the eldest of four sons of Guru Gobind Singh, was born to Mata Sundari ji) at Paonta on 26 January 1687.

When he was 12 years old, Guru Gobind Singh sent Sahibzad a Ajit Singh to the village where a Sikh sangat coming from Pothohar, northwest Punjab, was attacked and looted on the way by the Ranghars of Nuh, a short distance from Anandpur across the River Sutlej. Ajit Singh at the head of 100 Sikhs reached there on 23 May 1699, punished the Ranghars and recovered the looted property.

Once a Brahman came to Guru Gobind Singh’s darbar. He complained that his newly-wedded wife had been taken away by force by some Pathans of Bassi, near Hoshiarpur. Sahibzada Ajit Singh offered to help the Brahman to recover his wife. As instructed by Guru Gobind Singh,on 7 March 1703 he took out 100 horsemen to Bassi, near Hoshiarpur. With this band of young brave Sikhs, Baba Ajit Singh fell upon Bassi during the night. He arrested the Pathans responsible for the wicked deed. He recovered the Brahman’s wife. He took the wicked Pathans to Anandpur the following morning. The Brahman’s wife was restored to him.

An unequal but grim battle commenced with the sunrise on 7 December 1705 in the words of Guru Gobind Singh's Zafamamah, a mere forty defying a hundred thousand (lakh). He was 18 years old at the time of his supreme sacrifice for his faith. Gurdwara Qatalgarh now marks the spot where he fell, followed by Sahibzada Jujhar Singh, who led the next sally. The martyrdom of two of the sons of Guru Gobind Singh in the battle of Chamkaur is substantiated by a contemporary record in the form of an official letter preserved in a MS., AhkamiAlamgiriby Emperor Aurarigzib's official letter writer, Mirza 'Inayat Ullah Khan Ismi (1653-1725).

Jujhar Singh, Sahibzada (1691 - 1705), the second son of Guru Gobind Singh, was born to Mata Jito ji (also known as Mata Sundari ji) at Anandpur on 14 March 1691 (is now celebrated on 9 April each year - Nanakshahi calendar). Like his elder brother, Ajit Singh, he started training in the fighting skills (Gatka) as soon as he started learning the religious texts aged about 4 to 5 years. In 1699, when he was eight years old, he received holy Amrit at the rites of Khalsa initiation, called Amrit Sanskar. By the time it became necessary to leave Anandpur under the pressure of a besieging host in December 1705, Jujhar Singh, nearing the completion of his fifteenth year, was an experienced young warrior, strong and fearless.The news of Baba Ajit Singh attaining Shaheedi (martyrdom) spread. Hearing the news of his brother, Baba Jujhar Singh now desired to fight in the battlefield.

He asked Guru Sahib, "Permit me, dear father, to go where my brother has gone. Don't say that I am too young. I am your son. I am a Singh, a Lion, of yours. I shall prove worthy of you. I shall die fighting, with my face towards the enemy, with the Naam on my lips and the Guru in my heart." Guru Gobind Singh embraced him and said, "Go my son and wed the life-giving bride, Death. May the Almighty be with you always"

ZORAWAR SINGH (1696-1705), the third son of Guru Gobind Singh, was born to Mata Jito ji (also known as Mata Sundari ji) at Anandpur on 28 November 1696 and was barely nine years old at the time of the evacuation of Anandpur on the night of 5-6 December 1705. Since the death, on 5 December 1700, of Mata Jito ji, Mata Gujari, his grandmother had been especially attached to young Zorawar Singh and his infant brother, Fateh Singh. She took charge of both as the column moved out of Anandpur.

Fateh Singh, Sahibzada (1699-1705), the youngest of Guru Gobind Singh's four sons, was born to Mata Jito ji (also known as Mata Sundari ji) at Anandpur on 12 December 1699. After the death of his mother, on 5 December 1700, he was brought up under the care of his grandmother, Mata Gujari Kaur ji, with whom he remained till the last. On 26 December 1705, he was martyred at Sirhind along with his elder brother, Zorawar Singh. He is probably the youngest recorded martyr in history who knowingly laid down his life at the very tender age of 5 years. Sahibzada Fateh Singh and his older brother, Sahibzada Zorawar Singh are among the most hallowed martyrs in Sikhism.

Guru Gobind and his two older sons got separated from his mother, Mata Gujri and his two youngest sons, Zorawar and Fateh Singh during the confused departure from Anandpur. After they managed to cross the nearby river they felt themselves saved when they reached the village of Sahedi and ran into their former Hindu cook, Gangu who kindly gave them shelter in his home. But like a sly fox he handed them over to the Mughal authorities of his village, no doubt hoping for a reward.The two sons of Guru Gobind, Zorawar (9 years old) and Fateh (6 years old) were offered safe passage if they became Muslims. With a courage that belied their years, both boys refused to do so. Wazir Khan sentenced them to death. They were bricked alive. Although he did not know it then, Wazir Khan was to pay for the crime that he had committed. After Guru Gobind's death, Madhodas Bairagi, a hermit from Nanded, whom the Guru baptised as Banda Bahadur, besieged the Punjab. After laying waste, the cities of Samana and Sandhaura, he moved towards Sirhind and after defeating the Mughal forces, killed Wazir Khan. The place where the two sons of Guru Gobind were bricked alive is today known as Fatehgarh Sahib.