Bulstrode family

Bulstrode is the surname of a wizarding family. They used to be pure-blood and one of the Sacred Twenty-Eight, but more recent members, such as Millicent Bulstrode, are half-bloods, suggesting that one or multiple members of the Bulstrode family had Muggle or Muggle-born spouses. They are distantly related to the Blacks, the Flints, the Crabbes and the Potters.

Family Members

 * Millicent Bulstrode — a Slytherin student in Harry Potter's year at Hogwarts
 * Violetta Black née Bulstrode — wife of Cygnus Black II and mother of Dorea Potter née Black

Etymology
Bulstrode is an extremely rare surname in the United Kingdom. Its origin is uncertain, but it may be derived from a place name meaning either "fortress on the marsh" (from Old English burh, "fortress", and strod, "marsh"), "bull marsh" (from Old English bula, "bull", and strod),  or "Bur's marsh" (form Bur, the name of a family, and strod). Bulstrode Park is a large park to the northwest of the Buckinghamshire town of Gerrard's Cross in the English Home Counties. Bulstrode is a grumpy, anthropomorphic barge in the Railway Series books, on which the television show Thomas and Friends is based.