"heiron" meaning in Ancien français

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en ancien français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ancien français",
      "orig": "ancien français",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "hairon"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Oiseaux en ancien français",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Variante de hairon."
      ],
      "id": "fr-heiron-fro-noun-YGW6OPOp",
      "tags": [
        "alt-of"
      ],
      "topics": [
        "ornithology"
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "heiron"
}

{
  "categories": [
    "Noms communs en ancien français",
    "ancien français"
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "hairon"
        }
      ],
      "categories": [
        "Oiseaux en ancien français"
      ],
      "glosses": [
        "Variante de hairon."
      ],
      "tags": [
        "alt-of"
      ],
      "topics": [
        "ornithology"
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "heiron"
}