How do you reply to como se iiama tu hermana mayor?

The question "Como se llama tu hermana mayor?" is asking "What is your older sister's name?"

You can respond with:

* "Mi hermana mayor se llama [her name]." (My older sister's name is [her name].)

* "Su nombre es [her name]." (Her name is [her name].)

* "Se llama [her name]." (Her name is [her name].)

Replace "[her name]" with the actual name of your older sister.