"Eustace" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Prénoms masculins en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "name",
  "pos_title": "Prénom",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Termes rares en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Prénom masculin."
      ],
      "id": "fr-Eustace-en-name-qg7gT5tW",
      "tags": [
        "rare"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈjuːˌstɪs\\"
    }
  ],
  "tags": [
    "first name"
  ],
  "word": "Eustace"
}

{
  "categories": [
    "Prénoms masculins en anglais",
    "anglais"
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "name",
  "pos_title": "Prénom",
  "senses": [
    {
      "categories": [
        "Termes rares en anglais"
      ],
      "glosses": [
        "Prénom masculin."
      ],
      "tags": [
        "rare"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈjuːˌstɪs\\"
    }
  ],
  "tags": [
    "first name"
  ],
  "word": "Eustace"
}