Eberhard of Béthune

[file:Eberardo di béthune, il graecismus, 1275, copista lamberto di vergy (bml, pl 25 sin 10).jpg|thumb|Graecismus by Eberhard of Béthune]
Eberhard of Béthune was a Flemish grammarian of the early thirteenth century, from Arras. He was the author of Graecismus, a popular Latin grammatical poem, dated to around 1212. The title derives from a short section on the Greek language.
Eberhard was also actively engaged in opposing the Waldensians and wrote a book entitled Liber Antihaeresis against them. He is cited in Martyrs Mirror and Foxe's Book of Martyrs in relation to the etymology of the movement's name.