Hermann & Cassandra
"Gottlieb," he supplied. "Hermann. And it's Doctor, actually. High-level mathematics." His degree had wound up being used in the oddest ways back home, but hey. It was what it was. "I'm a professor at Hanover, in their mathematics and foreign language programs."
A fairly simple explanation, not a whole lot said, but it was reasonably talky for him. he was doing well.
"Because apparently when a German mathematician who actually speaks German shows up, you con him into teaching in both." He smiled wryly.