Marquart m. Old High German marka 'march; fortified area along a border' + Old High German wart 'guard, ward'.

Czech Republic

Latin

● 1349 Marquardus (nom) chlumecky 44; 1353 Marquardus (nom) ibid. 10, p. 21; 1355 Markwardi (gen) ibid. 81, Markwardus (nom) ibid. 75; 1356 Marquardi (gen) ibid. 135

Estonia

Middle Low German

● 1364 Marcqward BbRT p. 334; 1379x1383 Marcqward ibid. p. 336; 1387 Marcqward ibid. p. 339; 1400 Marcqward ibid. p. 342; 1405 Marcqward ibid. p. 344; 1406 Marcqward ibid. p. 344; 1421 Marcqward ibid. p. 349; 1426 Markqward ibid. p. 351; 1428 Marquard ibid. p. 352; 1431 Marqwart ibid. p. 355; 1436 Marckwart ibid. p. 359; 1437 Markwart ibid. p. 360

Germany

Latin

● 822x875 Marckwardus (nom) TradCorb §107, Marcward (abl) ibid. §124, Marcwardus (nom) ibid. §31; 963x1023 Marchardus (nom) ibid. §226; 1149 Marchwardus (nom) mairhofer XXIX, Marchwart (nom) ibid. XXXV; 1151 Marchwart (nom) ibid. XXXVIII; 1185 Marquardus (nom) quix-vol1 36; 1197 Marquardus (nom) hennes-vol1 1; 1210 Marquardus (nom) ibid. 10; 1216 Marquardus (nom) ibid. 21; 1217 Marquardus (nom) ibid. 28; 1218 Marquardus (nom) ibid. 32; 1221 Marquardus (nom) ibid. 61; 1401 Marquardi (gen) HD1401 no. 147, Marquardo (dat) ibid. no. 317