Shiv Dayal Singh Seth, called by the honorific "Soamiji Maharaj" by his disciples and devotees, was born on 24 August 1818 in Agra in the colonial era British India (present-day Agra, Uttar Pradesh, India), and died on 15 June 1878 in the same city.
His parents were followers of Guru Nanak of Sikhism and a local spiritual guru Tulsi Saheb.
Shiv Dayal Singh founded the Radhasoami movement – a 19th-century spiritual faith.