Яков was born in 1704. Яков's father is Павел Трофимович Кучев and his mother is <Unknown>. His paternal grandfather was Трофим Кучев and his paternal grandmother is <Unknown>. He had a brother and a sister, named Степан and Татьяна. He was the second oldest of the three children. He died at the age of 68 in 1772.