YOU SAID:

i only make cupcakes for people who know my last name

INTO JAPANESE

私は私の姓を知っている人にのみカップケーキを作ります

BACK INTO ENGLISH

I only make cupcakes for people who know my last name

INTO JAPANESE

私の名字を知っている人だけにカップケーキを作ります

BACK INTO ENGLISH

I only make cupcakes for people who know my last name