"-on" meaning in Spanish

{
  "forms": [
    {
      "form": "-ones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "-on m (noun-forming suffix, plural -ones)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "word": "-ón"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Obsolete spelling of -ón"
      ],
      "id": "en--on-es-suffix-LITvOvpx",
      "links": [
        [
          "-ón",
          "-ón#Spanish"
        ]
      ],
      "tags": [
        "alt-of",
        "masculine",
        "morpheme",
        "obsolete"
      ]
    }
  ],
  "word": "-on"
}

{
  "categories": [
    "Pages with raw sortkeys"
  ],
  "forms": [
    {
      "form": "-ones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "-on m (noun-forming suffix, plural -ones)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "word": "-ón"
        }
      ],
      "categories": [
        "Pages with raw sortkeys",
        "Spanish countable suffixes",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish masculine suffixes",
        "Spanish noun-forming suffixes",
        "Spanish obsolete forms",
        "Spanish suffixes"
      ],
      "glosses": [
        "Obsolete spelling of -ón"
      ],
      "links": [
        [
          "-ón",
          "-ón#Spanish"
        ]
      ],
      "tags": [
        "alt-of",
        "masculine",
        "morpheme",
        "obsolete"
      ]
    }
  ],
  "word": "-on"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: noun-forming suffix",
  "path": [
    "-on"
  ],
  "section": "Spanish",
  "subsection": "suffix",
  "title": "-on",
  "trace": ""
}