Cognomen Лёнька (Лёнька , Lyonka ) , globally, is an extremely rare last name. Much more prevalently, Лёнька is the forename as well as the last name.
Lenka
Пантелеев
, Lyonka 
) , globally, is an extremely rare last name. Much more prevalently, Лёнька is the forename as well as the last name.