Until 1898, the company was owned by the Faber family and was known as A.W. Faber. Then Ottilie von Faber, the heir to the business, married Count Alexander zu Castell-Rüdenhausen. But her grandfather Lothar von Faber had stipulated in his will that the name Faber should remain in the company for all time. And so, they changed their surname to Faber-Castell. 

Faber-Castell - Corporate uses the official name A.W. Faber-Castell. The company and brands are usually described however, under the name Faber-Castell.

Alexander & Ottilie Faber-Castell