These two fields lying to the west of Bicester Hill may romantically be thought to be so named after the quality of the grass giving rise to a rather superior kind of butter. Unfortunately not so. Actually named after the Brackley family who owned them and leased them out for fattening cattle, before despatch, at the Red Lion fasting pens. John Butterfield lived in a house in the High Street Brackley c. 1770s, but was generally to be found propping up the bar at the said Red Lion discussing fatstock weights and prices.
See the image for Paxtons Evenley Property sale of 1877 which mentions these fields by name.