How do you say have any siblings in French?

There are a few ways to say "have any siblings" in French, depending on the context and desired formality:

Formal:

* Avez-vous des frères et sœurs? (Do you have brothers and sisters?)

* Avez-vous des siblings? (Do you have siblings?)

Informal:

* Tu as des frères et sœurs? (Do you have brothers and sisters?)

* T'as des frères et sœurs? (More casual, literally "You have brothers and sisters?")

* Tu as des siblings? (Do you have siblings?)

Note: While "siblings" is a perfectly acceptable English word, it's less common in everyday French conversation. "Frères et sœurs" is the more usual phrase.