Aurions-Idernes is located some 50 km north by north-east of Pau and 12 km north-west of Maubourguet. Access to the commune is by the D205 road from Séméacq-Blachon in the south which passes through the length of the commune on the eastern side and continues north to join the D317. Access to the village is by the D219 road from Arrosès in the east which passes through the village and continues south-west to join the D13 near Cadillon. The commune is mainly farmland with some forested areas. The Larcis river forms most of the eastern border of the commune as it flows north to join the Lées east of Ségos. Several unnamed tributaries rise in the commune and flow east to join the Larcis.
The commune name in béarnais is Aurions-Idèrnas. Michel Grosclaude indicated that Aurions is probably from the Latin man's name Aurius with the suffix -onis giving "Domain of Aurius". The origin of the name Idernes however remains obscure. The following table details the origins of the commune name and other names in the commune.
Name
Spelling
Date
Source
Page
Origin
Description
Aurions
Ryons
1227
Raymond
17
Marca
Village
Aurios
1385
Raymond
17
Census
Riontz
1538
Raymond
17
Reformation
Aurious
1750
Cassini
Idernes
Ydernes
1385
Raymond
81
Census
Village
Ydernas
1540
Raymond
81
Reformation
Idernes
1750
Cassini
L'Abbat
L'Abbat
1863
Raymond
1
Moor
Les Barsious
Les Barsious
1863
Raymond
22
Moor
Cailhabet
Cailhabet
1863
Raymond
39
Farm
Castéra
Castéra
1863
Raymond
44
Place
Disse
Düsse
1487
Raymond
55
Establishments
Hamlet
Dissa
1538
Raymond
55
Reformation
Dyssa
1546
Raymond
55
Reformation
L'Enclos
L'Enclos
1863
Raymond
59
Hamlet
Serramone
Serramona
1538
Raymond
159
Reformation
Fief
Sarramonne
1675
Raymond
159
Reformation
Sarramoune
1780
Raymond
159
Aurions
Sources:
Raymond: , 1863, on the page numbers indicated in the table.
Grosclaude:Toponymic Dictionary of communes, Béarn, 2006
Establishments: Register of Establishments of Béarn
Aurions: Terrier of Aurions.
History
noted on page 17 of the 1863 dictionary that in 1385 Aurions and Idernes depended on the bailiwick of Lembeye and respectively had 11 and 13 fires. Idernes was merged with Aurions in 1844. In 1846 the commune, which had been part of the Canton of Garlin, changed to be part of the Canton of Lembeye.
In 2010 the commune had 110 inhabitants. The evolution of the number of inhabitants is known from the population censuses conducted in the commune since 1793. From the 21st century, a census of communes with fewer than 10,000 inhabitants is held every five years, unlike larger towns that have a sample survey every year.