How to Say "little brother" in Spanish
The Spanish word for “little brother” is “hermanito” — A1 level. This is a very common word in everyday Spanish.

Examples
Mi hermanito tiene que ir a la cama a las ocho.
My little brother has to go to bed at eight o'clock.
¡Hola, hermanito! ¿Quieres venir al cine con nosotros?
Hey, little brother (or bro)! Do you want to come to the movies with us?
Aunque es más alto que yo, para mí siempre será mi hermanito.
Even though he is taller than me, he will always be my dear brother.
The Affectionate Suffix -ito
'Hermanito' is built from 'hermano' (brother) plus the suffix '-ito.' This ending is used constantly in Spanish to make things sound smaller, younger, or, most importantly, to show love and affection.
Confusing Size and Affection
Mistake: “Thinking 'hermanito' can only be used for a small child.”
Correction: Remember that the affectionate meaning is often stronger than the size meaning. You can call your 40-year-old brother 'hermanito' to show him how much you care.
Related Translations
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.