| Quote #1
Quentin had grown up with that; the mere names were interchangeable and almost myriad. His childhood was full of them. (1.6)
The Sutpen family has loomed large over Quentin's entire life. They were always the topic of conversation in town, so he grew up hearing all about the strange goings-on at Sutpen's Hundred. Funny how Quentin almost feels more connected to the Sutpens than to his own family (the Compsons).
| Quote #2
"I saw what happened to Ellen, my sister, I saw her almost a recluse, watching those two doomed children growing up whom she was helpless to save." (1.12)
And Quentin's not the only one: Miss Rosa is also engrossed by the Sutpen family. After her sister Ellen married Sutpen, Miss Rosa herself became a victim of Sutpen's grandiose plans. It seems like it's almost impossible to avoid the train wreck that is Sutpen.
| Quote #3
"I saw Judith's marriage forbidden without rhyme or reason or shadow of excuse; I saw Ellen die with only me, a child, to turn to and ask to protect her remaining child; I saw Henry repudiate his home and his birthright and then return and practically fling the bloody corpse of his sister's sweetheart at the hem of her wedding gown […]." (1.12)
Because she only knows part of the story, Miss Rosa has no idea why Judith isn't allowed to marry Charles Bon (we don't either, at this point). Even though she's affected by the Sutpen drama, she still has to watch from the outside as the entire family falls apart.