Explanation:

Bhai Gurdas was a scion of the family of Guru Amar Das ji. He was contemporary of four Gurus, Guru Amar Das Ji, Guru Ram Das Ji, Guru Arjan Dev Ji and Guru Hargobind Ji. He was born probably in 1555 and died in 1629 / 1637 in the presence of Guru Hargobind Ji. He is accepted to be a nephew of Guru Amar Das Ji and maternal uncle of Guru Arjan Dev Ji.

There was no written record about the life and times of Guru Nanak but stories must have been going round by word of mouth but Bhai Gurdas Ji gives us a great insight about Guru Nanak in his first Vaar, which happens to be the longest one with 49 pauris. He describes the Creation of the Universe and the beliefs accepted by the ancient Hindu Mythology in the first 19 pauris.

Bhai gurdas gives the names of the important sikhs of the first six gurus in the 11th vaar.