The gentilic noun are adjectives that determine the place of origin of people or things.
As adjectives have gender (masculine or feminine) and number (singular or plural).
In general, the gentilic derived from the name of the place, but in some cases using the old name.
There are some cities and nations that have more than one gentilic. In games, we used the most commonly in masculine singular.
The formation of the gentilic from the name of the place (toponym) presents many cases, both regular and irregular.
In Spanish, the most common regular cases are formed by adding to the name of the place the suffixes -ano, -és, -ense, -eño, -ino.
REGULAR SPANISH EXAMPLES
Castilla = castellano; Soria = soriano; Sevilla = sevillano.
Álava = alavés; Gijón = gijonés; Barcelona = barcelonés; León = leonés.
Castellón = castellonense; Melilla = melillense; Almería = almeriense.
Extremadura = extremeño; Madrid = madrileño; Albacete = albaceteño.
Alicante = alicantino; Bilbao = bilbaíno; Salamanca = salmantino.
IRREGULAR SPANISH EXAMPLES
Ávila = abulense; Badajoz = pacense; Huelva = onubense.
Huesca = oscense; Fuerteventura = majorero; Elche = ilicitano.
Betanzos = brigantino; Cabra = egabrense; Calahorra = calagurritano.
Calatayud = bilbilitano; Martos = tuccitano; Orihuela = orcelitano.