"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_templates": [
    {
      "args": {
        "1": "osp",
        "2": "castiello",
        "3": "",
        "4": "castle"
      },
      "expansion": "castiello (“castle”)",
      "name": "m"
    }
  ],
  "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"
        }
      ],
      "derived": [
        {
          "word": "castellano"
        }
      ],
      "examples": [
        {
          "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.\n[…] 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.",
          "type": "quotation"
        }
      ],
      "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_templates": [
    {
      "args": {
        "1": "osp",
        "2": "castiello",
        "3": "",
        "4": "castle"
      },
      "expansion": "castiello (“castle”)",
      "name": "m"
    }
  ],
  "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 IPA pronunciation",
        "Old Spanish terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "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.\n[…] 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.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Kingdom of Castile"
      ],
      "links": [
        [
          "Castile",
          "Castile"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/kasˈtjeʎa/"
    }
  ],
  "word": "Castiella"
}