The Dumbledore family 

The first Dumbledore we know is Percival Dumbledore. Percival married Kendra and they had three children. Albus, Aberforth, and Ariana. 
Aberforth was the only one who married. The woman he married remains unknown. All we know is that she had a sister and they had a child named Aurelius.

We also know that Albus, Aberforth, and Ariana had an aunt named Honoria. We unfortunately do not know what side she was on.