A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Aleth-Loriel was likely a town during the time of the Trolloc Wars that is remembered in the song “The Fall of Aleth-loriel” (TEotW, Ch. 17). Moiraine claims its fall was as a result of the marriage of Rhea and Caar One Hand. It's location is not known and it is unlikely to have been a major town, unless time has changed its name, as it is not mentioned in the guide (TEotW, Ch. 19).