Lewis & Short

Bructĕri, ōrum (gen. -terūm, Plin. Ep. 2, 7, 2), m., = Βρούκτεροι, a German people occupying the country between the Rhine, the Lippe, Ems, and Weser, Tac. G. 33; id. A. 1, 51; 1, 60; 13, 56; id. H. 4, 21; 4, 77; 5, 18; Vell. 2, 105, 1.
In sing.: Bructĕrus, i, m., Claud. IV. Cons. Hon. 451; and adj. Bructĕrus, a, um: natio, Tac. H. 4, 61.