"ただの" meaning in Japanese

{
  "forms": [
    {
      "form": "Tadano",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "proper"
      },
      "expansion": "ただの • (Tadano)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese surnames",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "多田野: a surname"
      ],
      "id": "en-ただの-ja-name-I05ThsKr",
      "links": [
        [
          "多田野",
          "多田野#Japanese"
        ],
        [
          "surname",
          "surname"
        ]
      ]
    }
  ],
  "word": "ただの"
}

{
  "forms": [
    {
      "form": "Tadano",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "proper"
      },
      "expansion": "ただの • (Tadano)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese hiragana",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese proper nouns",
        "Japanese surnames",
        "Japanese terms with redundant sortkeys"
      ],
      "glosses": [
        "多田野: a surname"
      ],
      "links": [
        [
          "多田野",
          "多田野#Japanese"
        ],
        [
          "surname",
          "surname"
        ]
      ]
    }
  ],
  "word": "ただの"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "ただの"
  ],
  "section": "Japanese",
  "subsection": "proper noun",
  "title": "ただの",
  "trace": ""
}