Dictionary of Medieval Names
from European Sources

Azo m. A hypocoristic of any of various names beginning with Old High German adal 'noble'.

The double diminutive Ascelin outstripped the root form in popularity by the 12th C or so.

Belgium
Latin
1107 Ascelinus (nom) CartStBert 3
England
Latin
1222 azonis (gen) StPaulDom p. 6
1189 Acelinus (nom) GASurv p. 230
France
Latin
1047 Azonis (gen) CartNDSaintes II; 1138x1162 Aszo (nom) clairvaux-12thc 61; 1267 Aco (nom) NDParisII 2-II
1029x1033 Ascelinus (nom) CartStPC XII; 1115 Acelino (abl) CartNDJosaphat V; 1147 Acelinus (nom) clairvaux-12thc 19, Ascelini (gen) ibid. 19, Ascelinus (nom) ibid. 18; 1173 Ascelinus (nom) ibid. 155; 1174 Ascelinus (nom) ibid. 161; 1179 Accelinus (nom) ibid. 173, Acelini (gen) ibid. 181, Acelinus (nom) ibid. 172, Ecelinus (nom) ibid. 181; 1180 Ascelino (abl) RotScaNor p. 11; 1268 Ascelinus (nom) NDParisII 2-V; 1269 Ascelinus (nom) ibid. 2-III; 1378 Ascelino (dat) hanquetvol1 551
Germany
Latin
948 Azzonis (gen) HambUrk-vol1 XXXV; 1020 Azo (nom) quix-vol1 58
Ireland
Latin
fin12thC Ace (nom) MunDocIr III, p. 6
fin12thC Asilini (gen) MunDocIr III, p. 14
Italy
Latin
1100 Azo (nom) RCI-Cam1 629; 1195 Azonis (gen) ChStBo1 II; 1198 Azone (abl) ibid. III; 1236 Açonis (gen) TirNot1 6
1092 Azolino (nom) RCI-Cam1 565; 1156 Ascelinus (nom) CartYonne1 CCLXXX; 1164 Azotto (abl) SDE3 I, Azottum (acc) ibid. I; 1376 Acelino (abl) DouGen1 p. 18, Acelinus (nom) ibid. p. 218
Cite as: S.L. Uckelman. "Azo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Azo.