Märt was born in 1739. Märt's father was Jüri and his mother was Eva. His paternal grandparents were Niklus and Mai; his maternal grandparents are Hans and <Unknown>. He had six brothers and two sisters, named Jüri, Andres, Toomas, Evert, Hindrik, Villem, Epp and Mai. He died at the age of 32 in 1771.