"Castiella" meaning in Old Spanish

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "es",
            "2": "Castilla"
          },
          "expansion": "Spanish: Castilla\n→ French: Castille\n→ English: Castile\n→ Classical Nahuatl: Caxtillan\n→ Kaqchikel: kaxlan\n→ Pipil: caztiyah\n→ Tagalog: Kastila",
          "name": "desctree"
        }
      ],
      "text": "Spanish: Castilla\n→ French: Castille\n→ English: Castile\n→ Classical Nahuatl: Caxtillan\n→ Kaqchikel: kaxlan\n→ Pipil: caztiyah\n→ Tagalog: Kastila"
    }
  ],
  "etymology_text": "Toponym based on the feminine of castiello (“castle”).",
  "head_templates": [
    {
      "args": {
        "1": "osp",
        "2": "proper noun",
        "g": "f"
      },
      "expansion": "Castiella f",
      "name": "head"
    }
  ],
  "lang": "Old Spanish",
  "lang_code": "osp",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "castellano"
        }
      ],
      "examples": [
        {
          "english": "[…] of the noble king don Alfonso […] lord of Castile, of Toledo, of León, of Galicia, of Seville, of Cordoba, of Murcia, of Jaén and of the Algarve.",
          "ref": "c. 1250, Alfonso X, Lapidario, f. 1v:",
          "text": "[…] del noble Rey don alfonso […] Sennor de caſtiella de Toledo de Leon de Gallizia de Seuilla de cordoua de Murcia de Jahen. ⁊ del Algarbe.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Kingdom of Castile"
      ],
      "id": "en-Castiella-osp-name-p9K6WuTy",
      "links": [
        [
          "Castile",
          "Castile"
        ]
      ],
      "related": [
        {
          "word": "Espanna"
        }
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/kasˈtjeʎa/"
    }
  ],
  "word": "Castiella"
}

{
  "derived": [
    {
      "word": "castellano"
    }
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "es",
            "2": "Castilla"
          },
          "expansion": "Spanish: Castilla\n→ French: Castille\n→ English: Castile\n→ Classical Nahuatl: Caxtillan\n→ Kaqchikel: kaxlan\n→ Pipil: caztiyah\n→ Tagalog: Kastila",
          "name": "desctree"
        }
      ],
      "text": "Spanish: Castilla\n→ French: Castille\n→ English: Castile\n→ Classical Nahuatl: Caxtillan\n→ Kaqchikel: kaxlan\n→ Pipil: caztiyah\n→ Tagalog: Kastila"
    }
  ],
  "etymology_text": "Toponym based on the feminine of castiello (“castle”).",
  "head_templates": [
    {
      "args": {
        "1": "osp",
        "2": "proper noun",
        "g": "f"
      },
      "expansion": "Castiella f",
      "name": "head"
    }
  ],
  "lang": "Old Spanish",
  "lang_code": "osp",
  "pos": "name",
  "related": [
    {
      "word": "Espanna"
    }
  ],
  "senses": [
    {
      "categories": [
        "Old Spanish entries with incorrect language header",
        "Old Spanish feminine nouns",
        "Old Spanish lemmas",
        "Old Spanish proper nouns",
        "Old Spanish terms with quotations",
        "Pages with 2 entries",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "english": "[…] of the noble king don Alfonso […] lord of Castile, of Toledo, of León, of Galicia, of Seville, of Cordoba, of Murcia, of Jaén and of the Algarve.",
          "ref": "c. 1250, Alfonso X, Lapidario, f. 1v:",
          "text": "[…] del noble Rey don alfonso […] Sennor de caſtiella de Toledo de Leon de Gallizia de Seuilla de cordoua de Murcia de Jahen. ⁊ del Algarbe.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Kingdom of Castile"
      ],
      "links": [
        [
          "Castile",
          "Castile"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/kasˈtjeʎa/"
    }
  ],
  "word": "Castiella"
}