1. Family motto
1.1. "Toujours pur"
2. In-law related families
2.1. just many
3. Astronomy
3.1. Most of their names are either constellations, galaxies, and stars.
4. Disowned members
4.1. Artemisia Black
4.1.1. Was a half-blood, her father was muggle.
4.2. Eduardus Limette Black
4.2.1. Unknown
4.3. Lola Black
4.3.1. Married a muggle man
4.4. Phineas Black
4.4.1. Supported Muggle rights
4.5. Cedrella Black
4.5.1. Married a Weasley
4.5.1.1. The Weasleys were considered blood-traitors after protesting their inclusion on the Sacred Twenty-Eight.
4.5.1.1.1. They didn't like that the Potters weren't added for reasons they fit, too.
4.6. Marius Black
4.6.1. Was a Squib
4.7. Andromeda Black
4.7.1. Married a Muggle
4.8. Sirius Black
4.8.1. Was a Griffyndor
4.8.2. Was friends with a Potter
4.8.2.1. Not to mention a Pettigrew and a half-blood who also was a werewolf
4.8.2.1.1. and muggle-borns like lily
4.8.3. Desagreed with his family
4.8.3.1. Ran away to the Pottter's
5. Pure-blood supremacism
6. Unsung hero
6.1. R.A.B.
7. Lines
7.1. Male
7.1.1. Finished with the deaths of Sirius and Regulus Black.
7.2. Female
7.2.1. Continues with Scorpius Malfoy (grandchild of Narcissa), and Delphini Riddle (illigimate child of Bellatrix).
7.2.2. Technically with Teddy Lupin, grandson of Andromeda Black, too.