Arnold was the second son of Count Dudo-Henry of Laurenburg (German: Dudo-Heinrich von Laurenburg) and Anastasia of Arnstein, daughter of Count Louis II of Arnstein.
Arnold Schwarzenegger | Arnold Schoenberg | Benedict Arnold | Arnold Palmer | Arnold Bax | Matthew Arnold | Eddy Arnold | Hey Arnold! | Henry H. Arnold | David Arnold | Arnold Wesker | Thomas Arnold | Arnold Toynbee | Arnold Rothstein | Arnold Friberg | Arnold Dreyblatt | Arnold Bennett | Arnold Sommerfeld | Richard R. Arnold | Arnold Moss | Arnold Fanck | Arnold Böcklin | Arnold Arboretum | Arnold | Johnny Arnold | Frances Arnold | Arnold Zweig | Arnold Vosloo | Arnold Rüütel | Arnold Rimmer |
The Counts of Laurenburg and Nassau expanded their authority under the brothers Robert (Ruprecht) I (1123–1154) and Arnold I of Laurenburg (1123–1148).