*Jel is a very productive Aquitanian hydronymic root. It may be found at the origin of river names as:
Géla, tributary of the Neste d'Aragnouet.
Gèle, tributary of the Baïse.
Gélis, tributary of the Luy de Béarn.
Gélise, tributary of the Baïse.
Géline, tributary of the Échez.
Géloux, tributary of the Midouze.
Geüle, tributary of the Gave de Pau.
Geü, tributary of the Gave de Pau.
Jéoû, tributary of the Luy de Béarn.
The following place names are related:
Gélos, a commune in Béarn, and many house names Jeloz in the Basque Country.
Mongelos, a village of Lower Navarre
Casteljaloux, Gascon city in Lot-et-Garonne
