"-eur" meaning in Old French

{
  "head_templates": [
    {
      "args": {
        "1": "fro",
        "2": "suffix"
      },
      "expansion": "-eur",
      "name": "head"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "both etymologies",
          "word": "-or"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Old French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of -or (both etymologies)"
      ],
      "id": "en--eur-fro-suffix-gAbHvV6n",
      "links": [
        [
          "-or",
          "-or#Old French"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "-eur"
}

{
  "head_templates": [
    {
      "args": {
        "1": "fro",
        "2": "suffix"
      },
      "expansion": "-eur",
      "name": "head"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "both etymologies",
          "word": "-or"
        }
      ],
      "categories": [
        "Old French entries with incorrect language header",
        "Old French lemmas",
        "Old French suffixes"
      ],
      "glosses": [
        "Alternative form of -or (both etymologies)"
      ],
      "links": [
        [
          "-or",
          "-or#Old French"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "-eur"
}