Ans.
The first Master, Guru Nanak Dev had two sons,
Baba Siri Chand and Baba Lakhmi Chand.
Guru Angad Dev had two sons, Baba Dasu and Baba Datu Also he had two daughters, Bibi Amro and Bibi Anokhi.
Guru Amar Das had two sons, Baba Mohan and Baba Mohri. Also he had two daughters, Bibi Dani and Bibi Bhani.
Guru Ram Das had three sons, Baba Prithi Chand, Baba Maha Dev and Guru Arjan Dev.
Guru Arjan Dev had one son, Guru Har Gobind.
Guru Har Gobind had five sons, Baba Gurditta, Baba Sooraj Mal, Baba Ani Rae, Baba Atal Rae and Guru Tegh Bahadur. He also had one daughter, Bibi Veero.
Guru Hari Rae had two sons, Baba Ram Rae and Guru Hari Krishan. He also had an adopted daughter, Bibi Anoop Kaur.
Guru Hari Krishan was only eight years old when he left this world.
Guru Tegh Bahadur had one son, Guru Gobind Singh.
Guru Gobind Singh had four sons (Sahibzadas), Baba Ajit Singh, Baba Jujhar Singh, Baba Zoravar Singh and Baba Fateh Singh.