Сергей was born on September 17th, 1903 and his christening took place on September 17th, 1903 in Попадьино. His godfather was Тимофей Андреевич Сампсонов and his godmother was с.Захаровки к. Анастасия Егоровна Левина. Сергей's father was Игнат Андреевич Поликашин-Логинов and his mother was Наталья Матвеевна Поликашина. He had two brothers and four sisters, named Георгий, Александр, Васса, Мария, Евдокия and Ольга. He was the third youngest of the seven children.