"hendad" meaning in Gallois

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en gallois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en gallois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Gallois",
      "orig": "gallois",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de hen et de tad."
  ],
  "forms": [
    {
      "form": "hendadau",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en gallois de la famille",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Grand-père."
      ],
      "id": "fr-hendad-cy-noun-OhdBul0f",
      "raw_tags": [
        "Famille"
      ]
    },
    {
      "glosses": [
        "Ancêtre."
      ],
      "id": "fr-hendad-cy-noun-w4x978PC"
    }
  ],
  "synonyms": [
    {
      "word": "tad-cu"
    },
    {
      "word": "taid"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "hendad"
}

{
  "categories": [
    "Compositions en gallois",
    "Noms communs en gallois",
    "gallois"
  ],
  "etymology_texts": [
    "Composé de hen et de tad."
  ],
  "forms": [
    {
      "form": "hendadau",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en gallois de la famille"
      ],
      "glosses": [
        "Grand-père."
      ],
      "raw_tags": [
        "Famille"
      ]
    },
    {
      "glosses": [
        "Ancêtre."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "tad-cu"
    },
    {
      "word": "taid"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "hendad"
}