Erwan Vallerie ː Plomeleau, Plemeliau, 1066; Plumeliat, 1286; Plemeleau, 1287; Plimeleau, 1288; Plemeliau, 1296; Plemeliant,1296; Plemelio, 1304; Ploemeliau, 1387; Plouemiliau, 1516; Ploemellyau, 1554; Plomelio, 1630; Plumelio, 1636