Arabic place-names are very common except in the extreme northwest and the Basque regions.

They may be purly Arabic
(Al|cala= the castle, al|Andalus) = Andalusia

Arabic compounded with Romance
(Al|monāster = the monastry).

If a personal name is used it appears in second place (gebel|tarik = rock|Tarik = Gibraltar.

River names take the form wad|x

Examples are:
wadi|ana = river Anas, Guadiana
wad|al|kebir = river|the|great, Guadalquivier
wad|al|ajar = river|the|stones, Guadalajar
wad|al|lupe = river|the|wolf, Guadalupe.
wadi|al|fanar = river|the|lighthouse, Guadalbanar
wadi|al|imar = river|the|red, Guadalimar