A single nod to confirm: yes, he's an Altus. Then, "Calpurnia Artemaeus."
This part rarely goes well, at least if the listener is familiar with his mother. Generally, she's either the most evil harpy they've ever met (justifiable), or she's the best of her kind, and Benedict is a lazy ungrateful shit for not appreciating her more.

He always hopes they've never heard of her.