"Siwdan" meaning in Welsh

{
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "Siwdan f (not mutable)",
      "name": "cy-proper noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "Sudan",
          "word": "Swdan"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "South Sudan",
          "word": "De Siwdan"
        }
      ],
      "glosses": [
        "Alternative form of Swdan (“Sudan”)"
      ],
      "id": "en-Siwdan-cy-name-IodedKzp",
      "links": [
        [
          "Swdan",
          "Swdan#Welsh"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "feminine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sɪu̯ˈdan/"
    },
    {
      "rhymes": "-dan"
    }
  ],
  "word": "Siwdan"
}

{
  "derived": [
    {
      "english": "South Sudan",
      "word": "De Siwdan"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "Siwdan f (not mutable)",
      "name": "cy-proper noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "Sudan",
          "word": "Swdan"
        }
      ],
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:Welsh/dan",
        "Rhymes:Welsh/dan/2 syllables",
        "Welsh entries with incorrect language header",
        "Welsh feminine nouns",
        "Welsh lemmas",
        "Welsh non-mutable terms",
        "Welsh proper nouns"
      ],
      "glosses": [
        "Alternative form of Swdan (“Sudan”)"
      ],
      "links": [
        [
          "Swdan",
          "Swdan#Welsh"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "feminine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sɪu̯ˈdan/"
    },
    {
      "rhymes": "-dan"
    }
  ],
  "word": "Siwdan"
}