Arnold I may refer to:

Clergy

Arnold I of Cologne Arnold I (c. 1100 – 3 April 1151) was Archbishop of Cologne from 1137 to 1151. Life Arnold's origins are not definitively known. It is assumed he came from the lower Rhenish nobility. He became Provost of St. Andreas in Cologne in about 1124 ...

(c. 1100–1151), the Archbishop of Cologne 1137–1151 *

Arnold I of Vaucourt Arnold I of Vaucourt (, ) (''circa'' 1120 – May 25, 1183 in Trier), was the Archbishop of Trier from 1169 to 1183. He took a pro- Imperial position in the Investiture Controversy of the twelfth century. As archbishop, Arnold was accounted a cap ...

(c. 1120–1183), the Archbishop of Trier 1169–1183 *

Arnold I van Isenburg Arnold (or Arnoud) van Isenburg (died in April or June 1197) was Bishop of Utrecht from 1196 to 1197. Arnold descended from the German House of Isenburg and had been provost in Deventer since 1176. After Bishop Baldwin II van Holland died, Arn ...

(died c. 1197), the Bishop of Utrecht 1196–1197 * Arnold I (bishop of Coria) (died 1197/98), a Catholic bishop in Spain * Arnold I (bishop of Poznań) (died 1211), a Catholic bishop in Poland

Nobility

* Arnold I of Astarac (died 960), the first Count of Astarac from 926 * Arnold I, Count of Chiny (died 1106), son of Louis II *

Arnold I, Count of Loon Arnold I (b. about 1045 – d. about 1130), Count of Loon (Looz) from about 1079, son of Emmo, Count of Loon, and Suanhildis, daughter of Dirk III, Count of Holland, and his wife Othelandis. He was an ally of Henry of Verdun and Otbert, both ...

(c. 1050–c. 1130), son of Emmo *

Arnold I, Count of Cleves The Duchy of Cleves (; ) was a Imperial State, state of the Holy Roman Empire which emerged from the medieval . It was situated in the northern Rhineland on both sides of the Lower Rhine, around its capital Cleves and the towns of Wesel, Kalkar, ...

, the Count of Cleves 1119–1147 *

Arnold I, Count of Laurenburg Arnold I of Laurenburg, (died before 1154),Hesselfelt (1965). was count of Laurenburg and an ancestor of the House of Nassau. Life Arnold was a son of Dudo of Laurenburg () and the fourth of the seven daughters of count Louis I of Arnstein, pos ...

(died before 1154) * Arnold I, Lord of Egmond (c. 1337–1409), Lord of Egmond and IJsselstein {{hndis