Yes. [He sounds only slightly confused, but his parents are famous. It's not that hard to figure.] I'd ask how you knew, but I imagine there aren't many large Wizarding families left. [Albus. Albus pay attention for a moment and look at who you're talking to.

...ah.

Well. This...is both fascinating and perplexing all at once. Hello, Aunt Hermione.]

...it was Dad's idea to name us. [Nice recovery.]