"No," he said simply. Honest. It was the truth. Pollux memorized the family tree the same way every family member was forced to, and he couldn't recall a Potter being on it. "I know of them," he said. But their family wasn't one of great importance to the Blacks, though they were purebloods and respected.
"Arcturus has dealings with them," which meant so would Pollux eventually. He sighed before he could stop himself. This year was going to get complicated. Far more than it already was.