younger brother
Tom tiene un hermano menor.
Tom has a younger brother.
Él es el hermano menor que nunca tuve.
He is the younger brother I never had.
Siempre he querido conocer a tu hermano menor.
I've always wanted to meet your younger brother.
La madre le dijo que cuidara de su hermano menor.
The mother told him to take care of his younger brother.
Tom es tu hermano menor.
Tom is your younger brother.