Leberecht

Leberecht (レーベレヒト, Reeberehito) is an archscholar who serves as Florencia's retainer. He is married to Ottilie. They have three sons together, the youngest of whom is Hartmut.

Spoiler from Part 4 Volume 7 According to Rozemyne Leberecht looks exactly like an older version of his son Hartmut.

Leberecht is the half-brother of the current Count Leisegang, and he and his family are members of the Leisegang political faction. He is said to be very good at gathering information.