From Middle English clad(d), cladde, clade, past tense and past participle forms of clathen, clothen (“to put clothing on, clothe, dress”), from *clāþian (“to clothe”) (past participle ġeclāded, ġeclaþed, ġeclaþod), from clāþ, clǣþ (“cloth; (plural) clothes”); see further at etymology 1.