Bhai Harjas Ji

Mt Jto was the first of the three wives of the last Sikh Guru, Guru Gobind Singh The couple married onJune 1677 and had three children Jujhar Singh, Zorawar Singh and Fateh Singh.

According to some scholars, she was renamed as Mata Sundari after marriage and all four sons were born to Mata Sundari.

Source: Wikipedia