For the main article , see Alyosha Karamazov . Also called : Alyoshka , Alyoshenka , Alyoshechka , Alxeichick , Lyosha , Lyoshenka Variously referred to as Alyosha , Alyoshka , Alyoshenka , Alyoshechka , Alexeichik , Lyosha , and Lyoshenka , Aleksey at age 20 is the youngest of the Karamazov brothers .