Lysandra Sierra Black, {FICT}

Fictional Character Appearing in the Harry Potter Book Series:

DO NOT merge with real people or into the "big tree"

"...Lysandra Black (née Yaxley) was a pure-blood witch who married Arcturus Black II. The couple had three children together: Callidora, Cedrella, and Charis Black. Through Cedrella, who was disowned for marrying "blood traitor" Septimus Weasley, she is the maternal grandmother of Arthur Weasley. Lysandra may be related to the Death Eater Yaxley, and, through her daughters, the Longbottom and Crouch families..."

SOURCE: http://harrypotter.wikia.com/wiki/Lysandra_Yaxley