1) The flesh of the boar, as fattened for the table (OED).
1313 pro j apro empto de R. de Farnhill de braune, vijs, Bolton Priory. It came increasingly to refer to the animal itself: 1544 ‘enjoined on all who have any pigs called Braunes that they shall break their teeth’, Methley
1574 one lead seastron fro brawne, Brough
1659 a braune and 3 hoggs, Whitley.