Blanchflower is an English surname.
The surname means "white flower" and is of French origin, probably arriving in Great Britain around the time of the Norman Conquest. It has certainly been in existence in its current form since the start of the thirteenth century. The name probably originated as a nickname, or was used pejoratively to refer to a male with female characteristics.
Until the nineteenth century the majority of people with the surname Blanchflower lived in Norfolk, particularly in the villages between Wymondham and East Dereham, and there is still a high incidence of the surname in the county.
The number of people in the United Kingdom with the surname is currently around 328.