"Herði" meaning in Icelandic

{
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "proper noun form"
      },
      "expansion": "Herði",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "Hörður"
        }
      ],
      "glosses": [
        "dative of Hörður"
      ],
      "id": "en-Herði-is-noun-t8XkkwdS",
      "links": [
        [
          "Hörður",
          "Hörður#Icelandic"
        ]
      ],
      "tags": [
        "dative",
        "form-of"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛrðɪ"
    }
  ],
  "word": "Herði"
}

{
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "proper noun form"
      },
      "expansion": "Herði",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Icelandic entries with incorrect language header",
        "Icelandic non-lemma forms",
        "Icelandic proper noun forms",
        "Rhymes:Icelandic/ɛrðɪ",
        "Rhymes:Icelandic/ɛrðɪ/2 syllables"
      ],
      "form_of": [
        {
          "word": "Hörður"
        }
      ],
      "glosses": [
        "dative of Hörður"
      ],
      "links": [
        [
          "Hörður",
          "Hörður#Icelandic"
        ]
      ],
      "tags": [
        "dative",
        "form-of"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛrðɪ"
    }
  ],
  "word": "Herði"
}