Борис was born on July 19th, 1900 and his christening took place on July 19th, 1900 in Попадьино. His godfather was с.з.г.к. Василий Ильин младший Ларин and his godmother was с.з.к. Екатерина Тимофеевна Данилова. Борис's father was Григорий Родионович Склянкин and his mother was Екатерина Тимофеевна (Склянкина). He had a brother named Илья. Илья and Борис were twins.