Robert, also spelled Ruotbert or Rotbert (died 19 May 956), was the archbishop of Trier from 931 until his death. He played a leading role in the politics of both Germany and France, and especially of the Lotharingian territory in between. He was a patron of scholars and writers and a reformer of monasteries.
If Robert was the canonical age of thirty when elected bishop, he would have been born in 901 or earlier. This is most likely, since he was already the chancellor of the see of Trier under his predecessor, Rudgar. (In 938 he granted a lifetime precaria to his predecessor's niece, Ada, and her two sons.) Robert was originally from the Batavian region, perhaps a member of the Saxon nobility. His brother, Ansfried the elder, was said to have been the count of fifteen counties, including Toxandria, and his nephew's daughter was said to be related to the Unrochinger family. Robert was described by some records as a kinsman of Bruno the Great, a member of the Ottonian royal family. Alberic of Trois Fontaines wrote that Robert was even a brother of Queen Mathilda, wife of King Henry I of Germany and mother of Bruno, However, this is no longer considered possible. According to the Chronicle of Bishop Thietmar of Merseburg, Robert personally educated his nephew who would one day be Bishop of Utrecht, Ansfried the younger, in law and theology. Another possible brother sometimes proposed is Lambert (nobleman of the Maasgau), the proposed father of his nephew the younger Ansfried.