(Protestantism) Members of any congregation in the Anabaptist tradition of the Schwarzenau Brethren, practicing credobaptism and committed to nonresistance and nonviolence, some of whom may wear plain dress and shun modern technology.

(specifically) Members of the Church of the Brethren.

(poetic) kinsmen

(figurative) The body of members, especially of a fraternal, religious or military order.

Of or akin to; related; like