"Iestyn" meaning in Gallois

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en gallois issus d’un mot en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Prénoms masculins en gallois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Gallois",
      "orig": "gallois",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du latin Justinus."
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "name",
  "pos_title": "Prénom",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en gallois",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Exemples en gallois à traduire",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Iestyn ap Gwrgant."
        }
      ],
      "glosses": [
        "Justin."
      ],
      "id": "fr-Iestyn-cy-name-Re3tKPdA"
    }
  ],
  "sounds": [
    {
      "ipa": "\\jɛstɪn\\"
    }
  ],
  "tags": [
    "first name"
  ],
  "word": "Iestyn"
}

{
  "categories": [
    "Mots en gallois issus d’un mot en latin",
    "Prénoms masculins en gallois",
    "gallois"
  ],
  "etymology_texts": [
    "Du latin Justinus."
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "name",
  "pos_title": "Prénom",
  "senses": [
    {
      "categories": [
        "Exemples en gallois",
        "Exemples en gallois à traduire"
      ],
      "examples": [
        {
          "text": "Iestyn ap Gwrgant."
        }
      ],
      "glosses": [
        "Justin."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\jɛstɪn\\"
    }
  ],
  "tags": [
    "first name"
  ],
  "word": "Iestyn"
}