Forms of Engilbert and Ingalbert are often impossible to distinguish from each other.

Austria

Latin

● 928 Engilperht (nom) UrkStyria 18; 930 Engilperht (nom) ibid. 19; c1055 Engilberti (gen) ibid. 61; c1065 Engilberti (gen) ibid. 67; c1066 Engilperti (gen) ibid. 68, Engilpreht (nom) ibid. 68; c1070 Engilberti (gen) ibid. 69; 1074x1087 Engelberti (gen) ibid. 77, Engelbertus (nom) ibid. 77, Engilberti (gen) ibid. 77; c1075 Engilberti (gen) ibid. 78; c1100 Engelberti (gen) ibid. 89; c1130 Englinbertus (nom) ibid. 122a

Belgium

Dutch

● 1597x1598 Engelbeert BoonenGes p. 335

Brabant

Latin

● 1312 Enghelbertus (nom) JeanIII p. 41

Czech Republic

Latin

● 1395 Engelbertus (nom) LDFPUP1 p. 18

Denmark

Danish

● 1581 Enngelbret KD-1 no. 362

England

Latin

● 1189 Ingelbertus (nom) GASurv p. 221

Dutch

● 1571 Engelberts (gen) AuFr Kempen; 1575 Engelberts (gen) ibid. Kempe; 1577 Ingelberts (gen) ibid. Kempen; 1580 Engelberts (gen) ibid. Kempen; 1582 Engelbert ibid. Cempen; 1583 Engelberts (gen) ibid. Kempen; 1584 Engelbert ibid. Kempen; 1587 Engelbert ibid. Kempen

Early Modern English

● 1544 Ingilbert StNick-Sf p. 1

Estonia

Middle Low German

● 1383 Engelbrecht BbRT p. 336; 1397 Engelberd ibid. p. 340; 1412 Engelberd ibid. p. 346; 1415 Engelberd ibid. p. 347; 1422 Engelberd ibid. p. 350; 1433 Engelbrecht ibid. p. 356; 1437 Engelbrecht ibid. p. 359

◑ 1592 Inge Tiik1977 p. 285

France

Latin

● c823 Ingalbertus (nom) irminon-vol2 64; 933 Ingelberti (gen) St-Barnard-Romans no. 147; 1031 Ingelberti (gen) ibid. no. 107; c1050 Inguilbertus (nom) StVdM-II 675; 1079x1101 Ingelberti (gen) CartStPC IX; 1096 Engelbertus (nom) CartSPL1 IX; 1146 Engelberto (abl) HAP p. 374; 1147 Engelberto (abl) clairvaux-12thc 19, Engelbertus (nom) ibid. 15, Ingelbertus (nom) ibid. 18; 1163–64 Engilbertus (nom) ibid. 115; 1179 Hingelberto (abl) ibid. 179, Ingelbertus (nom) ibid. 177; 1190 Engilbertus (nom) CartNDdOurscamp CIII; 1378 Engelberti (gen) hanquetvol1 1376, Engilberto (dat) ibid. 1762

Middle French

● 1493 Englebert MSR1838 p. 380

◑ 1421 Englebin favier 1023, p. 222

Germany

Latin

● 925 Engilberti (gen) UrkStyria 14, Engilperht (nom) ibid. 14; 1134 Engelbertus (nom) quix-vol1 97; 1137 Engelbertus (nom) ibid. 102; 1189 Engelbertus (nom) ibid. 82; 1192 Engelbertus (nom) ibid. 40; 1196 Engelberto (abl) ibid. 68, Engilberto (abl) ibid. 68; 1216 Engilbertus (nom) hennes-vol1 22; 1218 Engelbertus (nom) quix-vol2 127; 1220 Engelbertus (nom) hennes-vol1 47; 1221 Engelberto (abl) quix-vol2 130; 1222 Engelberto (abl) ibid. 132, Engelbertus (nom) quix-vol1 74; 1223 Engelbertus (nom) quix-vol2 136; 1224 Engilbertus (nom) hennes-vol1 66; 1248 Engelbertus (nom) UrkMeck1 no. XXXIV; 1259 Eggelbertus (nom) CDL-1.1.1 XXXI, Engelberti (gen) ibid. XXXI, Engelbertus (nom) ibid. XXXI; 1278 Engelberto (dat) hennes-vol1 264, Engelbertus (nom) ibid. 264; 1281 Engelberto (abl) ibid. 275, Engilberto (abl) ibid. 272; 1284 Engelbertus (nom) ibid. 294, Engilbertus (nom) ibid. 294; 1288 Engilbertus (nom) ibid. 314; 1303 Engelberti (gen) BremUrk2 no. 31, Engelbertus (nom) ibid. no. 30

Italy

Latin

● 827 Engilperht (nom) FRA-XXXL 11; 1237 Engelpreti (gen) TirNot1 582, Engelpretus (nom) ibid. 584

Latvia

Latin

● 1286 Engelbertus (nom) RigSB 326; 1288 Eggelbertus (nom) ibid. 333; 1289 Eggelbertus (nom) ibid. 332, Engelberti (gen) ibid. 509, Engelbertus (nom) ibid. 340; 1290 Eggelbertus (nom) ibid. 345; 1291 Eggelbertus (nom) ibid. 347; 1293 Eggelbertus (nom) ibid. 351; 1294 Eggelbertus (nom) ibid. 355; 1299 Engelbertus (nom) ibid. 364; 1300 Engelbert (nom) ibid. 848; 1303 Engelbertus (nom) ibid. 372; 1307 Engilbertus (nom) ibid. 378

The Netherlands

Latin

● 709 Aengelbertus (nom) OrkGZ no. 2; 800 Engilberti (gen) ibid. no. 19; 801 Engilberti (gen) ibid. no. 22; 1356 Enghelbertus (nom) GesOIJ-1 p. 301; 1387 Engelbertus (nom) ibid. p. 305

Sweden

Latin

● 1323 ængilberti (gen) SDHK no. 3200