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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
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
England
Latin
1189 Odo (nom) GASurv p. 151, Odonis (gen) ibid. p. 145
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
France
Latin
699 Otto (nom) DCEL-2 Add. X; 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; 1174 Odo (nom) CartNDdOurscamp CXX, Odone (abl) ibid. CXX, Odonis (gen) ibid. CXX; 1180 Eudone (abl) RotScaNor p. 29, 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; 1201 Odo (nom) ibid. LXI; 1206 Odo (nom) ibid. XIV; 1209 Odonis (gen) ibid. LII; 1214 Odonis (gen) ibid. CXLI; 1217 Odo (nom) ibid. XXXI, Odonis (gen) ibid. XXXI; 1227 Odone (abl) ibid. XLV; 1238 Odonis (gen) ibid. CXXX; 1255 Odo (nom) ArrestReg-volI IX, Candlemas; 1257 Eudo (nom) ibid. IV, St. Martin, 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; 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; 1378 Odo (nom) hanquetvol1 581
1147 Odelini (gen) clairvaux-12thc 14; 1260 Odinus (nom) ArrestReg-volI XII, Candlemas
Old French
1296 Eude paris1296 p. 27, Heude ibid. p. 14; 1313 Eude Paris1313 p. 18, Eudes ibid. p. 16, Heude ibid. p. 24, Œude ibid. p. 15
1133 Eudon (obl) tailliar no. 1; 1313 Eudelot Paris1313 p. 57, Houdet ibid. p. 3
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 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; 1211 Ottone (abl) ibid. 11; 1212 Otto (nom) ibid. 12, Ottone (abl) quix-vol1 103; 1213 Otto (nom) hennes-vol1 14; 1214 Otto (nom) ibid. 15; 1216 Oddo (nom) ibid. 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; 1222 Otto (nom) quix-vol1 74; 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; 1401 Ottoni (dat) HD1401 no. 7, ottonis (gen) ibid. no. 128
Early New High German
1429 Ottens (gen) mairhofer DCCXXXII; 1497 Ott Nurn1497 338
Italy
Latin
1224 Otto (nom) hennes-vol1 65; 1245 Otto (nom) ibid. 120
1265x1339 Utulini (gen) BBC-Berg 134; 1285 Octonelli (gen) Perugia1285 p. 158; 1326 Ottolino (abl) Friuli-14thC no. 422, Ottolinus (nom) ibid. no. 422
Latvia
Latin
1288 Ottoni (dat) RigSB 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
Scotland
Latin
1214–1226 Odonis (gen) morton-vol1 1
Sweden
Old Swedish
1383 Vd (gen) SRA-vol2 no. 1919
Cite as: R. Le Get, S.L. Uckelman. "Otto". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 2. http://dmnes.org/2015/2/name/Otto.