Arnold was a son of count Rupert I of Laurenburg and Beatrix of Limburg, a daughter of Walram II ‘the Pagan’, Count of Limburg and Duke of Lower Lorraine, and Jutta of Guelders (daughter of count Gerard I of Guelders).
[2] His parentage is confirmed by the charter dated 1151 under which Henry II of Leez, Bishop of Liège, confirmed the donations by ‘domina Jutta, nobilissima matrona uxor ducis Walrami de Lemburg’ to Rolduc Abbey, which records the presence at her burial in Rolduc of ‘… Arnoldus quoque filius Ruberti comitis de Lunneburg natus ex domina Beatrice filia præfatæ dominæ …’.
[1][2] Arnold and Rupert were, together with their mother, last mentioned in a charter dated 1 April 1158.
[1][2][3] Due to the lack of data, there is much unknown about the early counts of Laurenburg and Nassau, including the exact family relationships.
He is supposed to be the father of count Rupert III of Nassau.