"Ériu" meaning in Middle Irish

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ga",
            "2": "Éire"
          },
          "expansion": "Irish: Éire",
          "name": "desc"
        }
      ],
      "text": "Irish: Éire"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "gv",
            "2": "Nerin"
          },
          "expansion": "Manx: Nerin",
          "name": "desc"
        }
      ],
      "text": "Manx: Nerin"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "gd",
            "2": "Èirinn"
          },
          "expansion": "Scottish Gaelic: Èirinn",
          "name": "desc"
        }
      ],
      "text": "Scottish Gaelic: Èirinn"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mga",
        "2": "sga",
        "3": "Ériu"
      },
      "expansion": "Old Irish Ériu",
      "name": "inh"
    }
  ],
  "etymology_text": "From Old Irish Ériu.",
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "Ériu",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "nÉriu",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "Hériu",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mga",
        "2": "proper noun",
        "g": "f"
      },
      "expansion": "Ériu f",
      "name": "head"
    }
  ],
  "lang": "Middle Irish",
  "lang_code": "mga",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Middle Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "mga",
          "name": "Countries",
          "orig": "mga:Countries",
          "parents": [
            "Polities",
            "Places",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "mga",
          "name": "Ireland",
          "orig": "mga:Ireland",
          "parents": [
            "British Isles",
            "Europe",
            "Islands",
            "Earth",
            "Eurasia",
            "Places",
            "Nature",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "mga",
          "name": "Islands",
          "orig": "mga:Islands",
          "parents": [
            "Places",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "Ailbe was the dog’s name, and Ireland was full of his fame.",
          "text": "Ailbe ainm in chon, ocus lan Heriu dia aurdarcus.",
          "type": "example"
        },
        {
          "english": "That is one of the six halls that were in Ireland at that time […]",
          "text": "Is í sein int ṡeised bruiden ro·boi i n‑Herind in tan sin […]",
          "type": "example"
        }
      ],
      "glosses": [
        "Ireland"
      ],
      "id": "en-Ériu-mga-name-Ar8d-poD",
      "links": [
        [
          "Ireland",
          "Ireland"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈeːrʲiu̯/",
      "note": "earlier"
    },
    {
      "ipa": "/ˈeːrʲu/",
      "note": "earlier"
    },
    {
      "ipa": "/ˈeːrʲə/",
      "note": "later"
    }
  ],
  "word": "Ériu"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ga",
            "2": "Éire"
          },
          "expansion": "Irish: Éire",
          "name": "desc"
        }
      ],
      "text": "Irish: Éire"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "gv",
            "2": "Nerin"
          },
          "expansion": "Manx: Nerin",
          "name": "desc"
        }
      ],
      "text": "Manx: Nerin"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "gd",
            "2": "Èirinn"
          },
          "expansion": "Scottish Gaelic: Èirinn",
          "name": "desc"
        }
      ],
      "text": "Scottish Gaelic: Èirinn"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mga",
        "2": "sga",
        "3": "Ériu"
      },
      "expansion": "Old Irish Ériu",
      "name": "inh"
    }
  ],
  "etymology_text": "From Old Irish Ériu.",
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "Ériu",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "nÉriu",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "Hériu",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mga",
        "2": "proper noun",
        "g": "f"
      },
      "expansion": "Ériu f",
      "name": "head"
    }
  ],
  "lang": "Middle Irish",
  "lang_code": "mga",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Middle Irish entries with incorrect language header",
        "Middle Irish feminine nouns",
        "Middle Irish lemmas",
        "Middle Irish proper nouns",
        "Middle Irish terms derived from Old Irish",
        "Middle Irish terms inherited from Old Irish",
        "Middle Irish terms with quotations",
        "Pages with 2 entries",
        "Pages with entries",
        "mga:Countries",
        "mga:Ireland",
        "mga:Islands"
      ],
      "examples": [
        {
          "english": "Ailbe was the dog’s name, and Ireland was full of his fame.",
          "text": "Ailbe ainm in chon, ocus lan Heriu dia aurdarcus.",
          "type": "example"
        },
        {
          "english": "That is one of the six halls that were in Ireland at that time […]",
          "text": "Is í sein int ṡeised bruiden ro·boi i n‑Herind in tan sin […]",
          "type": "example"
        }
      ],
      "glosses": [
        "Ireland"
      ],
      "links": [
        [
          "Ireland",
          "Ireland"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈeːrʲiu̯/",
      "note": "earlier"
    },
    {
      "ipa": "/ˈeːrʲu/",
      "note": "earlier"
    },
    {
      "ipa": "/ˈeːrʲə/",
      "note": "later"
    }
  ],
  "word": "Ériu"
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: Ériu/Middle Irish 'radical' base_tags=set()",
  "path": [
    "Ériu"
  ],
  "section": "Middle Irish",
  "subsection": "proper noun",
  "title": "Ériu",
  "trace": ""
}

{
  "called_from": "inflection/735",
  "msg": "inflection table: unrecognized header: 'lenition'",
  "path": [
    "Ériu"
  ],
  "section": "Middle Irish",
  "subsection": "proper noun",
  "title": "Ériu",
  "trace": ""
}

{
  "called_from": "inflection/735",
  "msg": "inflection table: unrecognized header: 'nasalization'",
  "path": [
    "Ériu"
  ],
  "section": "Middle Irish",
  "subsection": "proper noun",
  "title": "Ériu",
  "trace": ""
}