"Mjǫllnir" meaning in Vieux norrois

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms propres en vieux norrois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Vieux norrois",
      "orig": "vieux norrois",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Vieux norrois",
  "lang_code": "non",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en vieux norrois de la mythologie nordique",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en vieux norrois",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Mjöllnir."
      ],
      "id": "fr-Mjǫllnir-non-name-3Yj9rPnu",
      "raw_tags": [
        "Mythologie nordique"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "*\\ˈmj̃ɔ̃lːnɪ̃r\\"
    }
  ],
  "word": "Mjǫllnir"
}

{
  "categories": [
    "Noms propres en vieux norrois",
    "vieux norrois"
  ],
  "lang": "Vieux norrois",
  "lang_code": "non",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "categories": [
        "Lexique en vieux norrois de la mythologie nordique",
        "Wiktionnaire:Exemples manquants en vieux norrois"
      ],
      "glosses": [
        "Mjöllnir."
      ],
      "raw_tags": [
        "Mythologie nordique"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "*\\ˈmj̃ɔ̃lːnɪ̃r\\"
    }
  ],
  "word": "Mjǫllnir"
}