Dictionary of Medieval Names
from European Sources

Otto m. Old High German ōt, Old Saxon ōd 'wealth, riches'.

The name of four Holy Roman Emperors, a Frankish king, and a number of saints, as well as the baptismal name of a 14th C pope.

The forms Otto and Otho are preferred in Germany, with Odo being more common in France.

Austria
Latin
1237 Otto (nom) hennes-vol1 96; 1277 Ottone (abl) FRA-XXXL 355
Belgium
Latin
1107 Odo (nom) CartStBert 3, Odone (abl) ibid. 3, Odonis (gen) ibid. 3; 1238 Otto (nom) OvdFB 3
Brabant
Latin
1312 Ottho (nom) JeanIII p. 25, Otto (nom) ibid. p. 28
Czech Republic
Latin
1349 Ottoni (dat) chlumecky 36; 1353 Ottoni (dat) ibid. 97; 1356 Otto (nom) ibid. 130
1351 Otycone (abl) chlumecky 52, Otyk (nom) ibid. 35
Middle High German
1331 Ott (nom) Rössler1 36; c1339 Otto (nom) ibid. 93; 1342 Ott (nom) ibid. 98; 1349 Otten (gen) ibid. 48; 1389 Otto (nom) ibid. 118
England
Latin
1185x1186 Oto (nom) PR-XXXVI p. 11; 1189 Odo (nom) GASurv p. 151, Odonis (gen) ibid. p. 145; 1222 Odo (nom) StPaulDom p. 22, Odonis (gen) ibid. p. 23; 1246 Odonem (acc) PSS-II p. 6, Odonis (gen) ibid. p. 6; 1296 Odo (nom) RCS-1 p. 93b, Odonis (gen) ibid. p. 95a
Estonia
Middle Low German
1431 Otte BbRT p. 355
1385 Otke BbRT p. 338; 1386 Otke ibid. p. 338; 1406 Otke ibid. p. 344; 1433 Otke ibid. p. 356; 1434 Otke ibid. p. 357; 1436 Otke ibid. p. 358; 1592 Ottste Tiik1977 p. 287
Finland
Early Modern Swedish
1548 Ottes (gen) Audén1980 p. 169
France
Latin
699 Otto (nom) DCEL-2 Add. X; c823 Odo (nom) irminon-vol2 94, Ved; 937x93 Odon (acc) St-Bernard-Romans no. 99, Odoni (gen) ibid. no. 80; 1067 Odo (nom) CartNDSaintes XII, Odonis (gen) ibid. XII; 1079x1081 Odo (nom) ibid. XXI, Oto (nom) ibid. XXI; 1079x1101 Odo (nom) CartStPC IX; 1082x1087 Odo (nom) St-Bernard-Romans no. 120; 1101x1129 Odo (nom) CartStPC XXII, Odone (abl) ibid. XXVIII; a1108 Odo (nom) ibid. XXI; a1116 Odo (nom) ibid. XX, Odonis (gen) ibid. XX; 1123 Odonis (gen) CartNDJosaphat XII; 1130 Udone (abl) CartStPC VIII; 1135 Odo (nom) clairvaux-12thc 7, Odone (abl) ibid. 7, Oto (nom) ibid. 7; 1138x62 Odo (nom) ibid. 66, Odonis (gen) ibid. 66; c1140 Odo (nom) CartNDdOurscamp LXXXIII; 1143x1146 Odo (nom) clairvaux-12thc 12; 1146 Odo (nom) CartNDSaintes VIII; 1147 Hoto (nom) clairvaux-12thc 15, Odo (nom) ibid. 14, Odone (abl) ibid. 14; c1147 Odonis (gen) CartNDdOurscamp LXII; 1147 Odonis (gen) clairvaux-12thc 17; 1147x1162 Odo (nom) ibid. 44; 1151 Odo (nom) ibid. 23; 1153 Odo (nom) CartNDSaintes IX; 1154 Odo (nom) CartNDdOurscamp LIV, clairvaux-12thc 27; c1156 Odonis (gen) CartNDdOurscamp XXXII; 1159 Odo (nom) StVdM-II 736; 1160 Odonis (gen) CartNDdOurscamp CXIV; c1160 Odonis (gen) ibid. XVI; 1162 Odonis (gen) clairvaux-12thc 39; 1163 Oddo (nom) ibid. 94, Odo (nom) ibid. 99, Odonis (gen) ibid. 99; 1163–64 Odo (nom) ibid. 106, Odonis (gen) ibid. 106; 1164 Odo (nom) ibid. 120, Odonis (gen) ibid. 120; 1165 Odo (nom) ibid. 125; 1166 Odo (nom) ibid. 130, Odone (abl) ibid. 130; 1171 Odo (nom) ibid. 140; 1173 Odo (nom) ibid. 154; 1174 Odo (nom) CartNDdOurscamp CXX, clairvaux-12thc 161, Odone (abl) CartNDdOurscamp CXX, Odonis (gen) ibid. CXX; 1178 Odo (nom) clairvaux-12thc 166, Odone (abl) ibid. 166, Odonis (gen) ibid. 166; 1179 Odo (nom) ibid. 172, Odone (abl) ibid. 176, Odonis (gen) ibid. 172; 1180 Odone (abl) CartNDdOurscamp LV, RotScaNor p. 3, Odonis (gen) ibid. p. 14, Otonis (gen) ibid. p. 1; 1183 Odone (abl) CartNDdOurscamp LVI; 1187 Odonis (gen) ibid. LVII; 1190 Odo (nom) ibid. CIII; 1196 Odo (nom) ibid. CXXXIX; c1200 Odo (nom) CartSavII 201; 1201 Odo (nom) CartNDdOurscamp LXI, NDParisII 1-IX, Odonis (gen) ibid. 2-XLVIII; 1203 Odo (nom) ibid. 2-LXXIX; 1204 Odo (nom) ibid. 2-LXXXVI; 1206 Odo (nom) CartNDdOurscamp XIV, NDParisII 2-LXIX; 1209 Odonis (gen) CartNDdOurscamp LII; 1214 Odonis (gen) ibid. CXLI; a1215 Odonis (gen) NDParisII 2-LXXIII; 1217 Odo (nom) CartNDdOurscamp XXXI, Odonis (gen) ibid. XXXI; 1227 Odone (abl) ibid. XLV; 1236 Odo (nom) NDParisII 2-XXXIX; 1238 Odonis (gen) CartNDdOurscamp CXXX; 1255 Odo (nom) ArrestReg-volI IX, Candlemas; 1257 Odone (abl) ibid. XV, BMV; 1258 Odo (nom) ibid. XXIX, Candlemas; 1259 Odonem (acc) ibid. II, BMV, Odonis (gen) ibid. XIII, St. Martin; 1260 Odo (nom) ibid. VI, Candlemas; 1267 Odo (nom) NDParisII 2-XXVII; 1273 Odo (nom) ibid. 2-XLIII; 1283–86 Otho (nom) GasReg-A; 1287 Otho (nom) ibid.; 1301 Odonis (gen) MemPic-vol17 p. 258; 1310/11 Otho (nom) GasReg-A; 1310 Otho (nom) ibid.; 1313 Odonem (acc) CartNDdOurscamp LXXXVIII; 1345 Ottoni (dat) CDEM-7.2 626; 1378 Odo (nom) hanquetvol1 581
1147 Odelini (gen) clairvaux-12thc 14; 1179 Odinus (nom) ibid. 176; 1260 Odinus (nom) ArrestReg-volI XII, Candlemas
Old French
1296 Eude paris1296 p. 27, Heude ibid. p. 14; 1313 Eude Paris1313 p. 18, Heude ibid. p. 24, Œude ibid. p. 15
1133 Eudon (obl) tailliar no. 1; 1292 Otelin 1292paris p. 2; 1313 Houdet Paris1313 p. 3, Oudin ibid. p. 6
Middle French
1392 Oudinet MemBret-II col. 611; 1418 Odin HGParis p. 376, Oudin ibid. p. 380, Oudinet ibid. p. 373
Germany
Latin
822x875 Hodo (nom) TradCorb §4, Oddo (abl) ibid. §123, Oddone (abl) ibid. §97; 937 Otto (nom) HambUrk-vol1 XXXI, Ottoni (dat) ibid. XXXII, Ottonis (gen) ibid. XXXI; 941 Otto (nom) quix-vol1 11, Ottonis (gen) ibid. 11; 947 Otto (nom) ibid. 12, Ottonis (gen) ibid. 12; 948 Ottho (nom) ibid. 88, Otthone (abl) ibid. 88, Otthonis (gen) ibid. 88; 965 Otto (nom) HambUrk-vol1 XLI, Ottonis (gen) ibid. XLI; 966 Otto (nom) ibid. XLIII, quix-vol1 13, Ottonis (gen) HambUrk-vol1 XLIII, quix-vol1 13; 967 Otto (nom) HambUrk-vol1 XLIV, Ottonis (gen) ibid. XLIV; 972 Otto (nom) quix-vol1 15, Ottonis (gen) ibid. 15; 974 Ottho (nom) ibid. 89, Otthonis (gen) ibid. 89, Otto (nom) HambUrk-vol1 XLV, Ottonis (gen) ibid. XLV; 983 Otto (nom) ibid. XLVI, Ottonis (gen) ibid. XLVI; 985 Ottho (nom) quix-vol1 90, Otthonis (gen) ibid. 90; 988 Otto (nom) HambUrk-vol1 XLIX, Ottonem (acc) ibid. LI, Ottonis (gen) ibid. XLIX; 997 Ottho (nom) quix-vol1 91, Otthoni (dat) ibid. 49, Otthonis (gen) ibid. 91, Otto (nom) ibid. 16, Ottonis (gen) ibid. 16; 998 Otto (nom) ibid. 17, Ottonis (gen) ibid. 17; 1000 Otto (nom) ibid. 19, Ottonis (gen) ibid. 19; 1001 Otto (nom) HambUrk-vol1 LIV, Ottonis (gen) ibid. LIV; 1003 Ottonis (gen) ibid. LVI; 1009 Oddo (nom) ibid. LVIII, Oddonem (acc) ibid. LVIII; 1061 Vdo (nom) quix-vol1 60, Vdone (abl) ibid. 60; 1064 Vdo (nom) ibid. 92; 1112 Ottonis (gen) ibid. 26; 1134 Otto (nom) ibid. 97; 1136 Otto (nom) ibid. 98, Udo (nom) ibid. 98; 1138 Vdo (nom) ibid. 28; 1142 Ottonis (gen) mairhofer VII; 1147 Ottonis (gen) quix-vol1 29; 1151 Otto (nom) mairhofer XXXVI; 1165 Ottonis (gen) quix-vol1 31; 1194 Otto (nom) ibid. 54; 1207 Otto (nom) hennes-vol1 8; 1210 Otto (abl) ibid. 10, Ottone (abl) CDL-1.1.1 IV; 1211 Ottone (abl) hennes-vol1 11; 1212 Otto (nom) ibid. 12, Ottone (abl) quix-vol1 103; 1213 Otto (nom) hennes-vol1 14; 1214 Otto (nom) ibid. 15; 1215 Otto (nom) quix-vol2 126; 1216 Oddo (nom) hennes-vol1 20, Otto (nom) ibid. 24; 1217 Otto (nom) ibid. 28; 1219 Otto (nom) ibid. 39, Vdonis (gen) quix-vol1 73; 1220 Otto (nom) hennes-vol1 44, Ottonis (gen) quix-vol2 129; 1221 Otto (nom) ibid. 130; 1222 Otto (nom) quix-vol1 74, quix-vol2 132; 1231 Otto (nom) CDL-1.1.1 XI; 1234 Otto (nom) hennes-vol1 89; 1240 Otto (nom) ibid. 104; 1249 Otto (nom) ibid. 134; 1250 Otto (nom) ibid. 138, Ottonis (gen) ibid. 138; 1251 Otto (nom) ibid. 142; 1253 Otto (nom) ibid. 145; 1260 Otto (nom) ibid. 187; 1261 Ottone (abl) FRA-XXXL 207; 1301 Otto (nom) UrkHan 3; 1305 Otto (nom) CDL-1.2.1 CXCIII; 1338 Otto (nom) UrkHeil1 146; 1351 Otto (nom) UrkHan 8; 1401 Ottoni (dat) HD1401 no. 7, ottonis (gen) ibid. no. 128
Middle High German
1293 Ot (nom) UrkWitt-II 189, Ott ibid. 187, Otte (nom) ibid. 188, Otten (acc) ibid. 187
Early New High German
1401 Ott (nom) UrkKH-2 907; 1429 Ottens (gen) mairhofer DCCXXXII; 1497 Ott Nurn1497 338
Middle Low German
1332 Otte UrkHan 5; 1347 Otten (acc) ibid. 7
Ireland
Latin
fin12thC Odo (nom) MunDocIr III, p. 22
Italy
Latin
967 Otto (nom) RCI-Cam1 3; 999 Otho (nom) HGSav-4.1 p. 1, Ottonis (gen) ibid. p. 2; 1224 Otto (nom) hennes-vol1 65; 1236 Otone (abl) TirNot1 8, Ottonem (acc) ibid. 7, Ottoni (dat) ibid. 15, Ottonis (gen) ibid. 7; 1237 Otto (nom) ibid. 585, Ottonis (gen) ibid. 587; 1245 Otto (nom) hennes-vol1 120; 1257 Otto (nom) ibid. 165; 1261 Otto (nom) FRA-XXXL 209
1236 Ottolini (gen) TirNot1 11, Ottolinum (acc) ibid. 6; 1265x1339 Utulini (gen) BBC-Berg 134; 1285 Octonelli (gen) Perugia1285 p. 158; 1310 Ottolinus (nom) MonRav-2 CCCL; 1326 Ottolino (abl) Friuli-14thC no. 422, Ottolinus (nom) ibid. no. 422
Latvia
Latin
1288 Otto (nom) RigSB 528, Ottoni (dat) ibid. 388; 1289 Otto (nom) ibid. 135, Ottoni (dat) ibid. 339; 1290 Otto (nom) ibid. 137; 1293 Otto (nom) ibid. 163; 1294 Otthoni (dat) ibid. 170; 1296 Ottoni (dat) ibid. 68; 1299 Ottonis (gen) ibid. 277
Middle Low German
1462 Otte Arbusow p. 99
The Netherlands
Latin
1235 Otto (nom) hennes-vol1 93; 1243 Otto (nom) ibid. 112; 1288 Odo (nom) GesOIJ-1 p. 296, Odomis (gen) ibid. p. 296; 1291 Otto (nom) ibid. p. 297, Ottonis (gen) ibid. p. 297; 1311 Odo (nom) ibid. p. 298, Odonis (gen) ibid. p. 298; 1347 otto (nom) ibid. p. 300; 1349 Odonis (gen) ibid. p. 300
Poland
Middle High German
1324x1332 Otto SBGlatzer p. 1
Scotland
Latin
1214–1226 Odonis (gen) morton-vol1 1
Spain
Latin
889 Oddone (nom) CDCB-XV MMXVII; 1016 Odo (nom) ibid. MMCLXXIII; 1192 Otonis (gen) ibid. MMCCVIII
Sweden
Old Swedish
1383 Vd (gen) SRA-vol2 no. 1919
Switzerland
Latin
1155 Otho (nom) CartHaut 6; 1157 Otto (nom) ibid. 7; 1166 Octone (abl) ibid. 19, Otho (nom) ibid. 20; 1179 Hoto (nom) ibid. 24; 1180 Octo (nom) ibid. 26; 1186 Otho (nom) ibid. 27; 1215 Otho (nom) ibid. 34; 1220 Oto (nom) ibid. 37
Cite as: R. Le Get, S.L. Uckelman. "Otto". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Otto.