History for ready reference, Volume 1, A-Elba
book 2, chapter 12.
CAROLINGIA.
On the division of the empire of Charlemagne between his three grandsons, A. D. 843, the western kingdom, which fell to Charles, took for a time the name of Carolingia, as part of Lothar’s middle kingdom took the name of Lotharingia, or Lorraine. But the name died out, or was slowly superseded by that of France.
_E. A. Freeman, Historical Geography of Europe,