"billingr" meaning in Vieux norrois

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en vieux norrois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Vieux norrois",
      "orig": "vieux norrois",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Vieux norrois",
  "lang_code": "non",
  "pos": "noun",
  "pos_title": "Nom commun 1",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en vieux norrois de la famille",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Jumeau."
      ],
      "id": "fr-billingr-non-noun-Mhd-J3eX",
      "raw_tags": [
        "Famille"
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "billingr"
}

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en vieux norrois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Vieux norrois",
      "orig": "vieux norrois",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Vieux norrois",
  "lang_code": "non",
  "pos": "noun",
  "pos_title": "Nom commun 2",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en vieux norrois de la sexualité",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Hermaphrodite."
      ],
      "id": "fr-billingr-non-noun-vnJRxXRw",
      "topics": [
        "sexuality"
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "billingr"
}

{
  "categories": [
    "Noms communs en vieux norrois",
    "vieux norrois"
  ],
  "lang": "Vieux norrois",
  "lang_code": "non",
  "pos": "noun",
  "pos_title": "Nom commun 1",
  "senses": [
    {
      "categories": [
        "Lexique en vieux norrois de la famille"
      ],
      "glosses": [
        "Jumeau."
      ],
      "raw_tags": [
        "Famille"
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "billingr"
}

{
  "categories": [
    "Noms communs en vieux norrois",
    "vieux norrois"
  ],
  "lang": "Vieux norrois",
  "lang_code": "non",
  "pos": "noun",
  "pos_title": "Nom commun 2",
  "senses": [
    {
      "categories": [
        "Lexique en vieux norrois de la sexualité"
      ],
      "glosses": [
        "Hermaphrodite."
      ],
      "topics": [
        "sexuality"
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "billingr"
}