The story
- Proto-Indo-European*ḱes-
- Proto-Indo-European*ḱstrom
- Proto-Italic*kastrom
- Latincastrum
- Latincastellum
- Latincastella
- LatinCastella
- Old SpanishCastiella
- SpanishCastilla
- Middle FrenchCastilleder.?
- EnglishCastile
- Spanishcastellano
- English todayCastilian
From Castile + -ian. Calque of Spanish castellano (“of or related to Castile, Spain, or the Spanish language”). Doublet of castellano, castellanus, castellan, and chatelain.
Words from the same roots
Spanishcastellano all →
castellano
Etymology from Wiktionary, CC BY-SA 4.0.