"þeirra" meaning in Islandais

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de pronoms personnels en islandais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Islandais",
      "orig": "islandais",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Islandais",
  "lang_code": "is",
  "pos": "pron",
  "pos_title": "Forme de pronom personnel",
  "senses": [
    {
      "form_of": [
        {
          "word": "þeir"
        }
      ],
      "glosses": [
        "Génitif de þeir."
      ],
      "id": "fr-þeirra-is-pron-ZDXofHe3"
    },
    {
      "form_of": [
        {
          "word": "þær"
        }
      ],
      "glosses": [
        "Génitif de þær."
      ],
      "id": "fr-þeirra-is-pron-w4BPpDSM"
    },
    {
      "form_of": [
        {
          "word": "þau"
        }
      ],
      "glosses": [
        "Génitif de þau."
      ],
      "id": "fr-þeirra-is-pron-OvIo3sHl"
    }
  ],
  "sounds": [
    {
      "ipa": "\\θɛɪ.ra\\"
    }
  ],
  "tags": [
    "form-of",
    "person"
  ],
  "word": "þeirra"
}

{
  "categories": [
    "Formes de pronoms personnels en islandais",
    "islandais"
  ],
  "lang": "Islandais",
  "lang_code": "is",
  "pos": "pron",
  "pos_title": "Forme de pronom personnel",
  "senses": [
    {
      "form_of": [
        {
          "word": "þeir"
        }
      ],
      "glosses": [
        "Génitif de þeir."
      ]
    },
    {
      "form_of": [
        {
          "word": "þær"
        }
      ],
      "glosses": [
        "Génitif de þær."
      ]
    },
    {
      "form_of": [
        {
          "word": "þau"
        }
      ],
      "glosses": [
        "Génitif de þau."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\θɛɪ.ra\\"
    }
  ],
  "tags": [
    "form-of",
    "person"
  ],
  "word": "þeirra"
}