 Whatever its true original name was, the village was described in an 870 document – as repeated in a 10th-century copy – as "Glena".The name "Glene" then appeared in a now lost 893 book of feudal holdings from Prüm, of which a 1222 transcription is preserved.Once arising over this "Glene" in Prüm Abbey’s directory of holdings, the "Prümer Urbar", was a scientific debate, which has only now been settled.