"dei" meaning in Old French

{
  "forms": [
    {
      "form": "dei oblique singular or",
      "tags": [
        "canonical",
        "masculine"
      ]
    },
    {
      "form": "deis",
      "tags": [
        "oblique",
        "plural"
      ]
    },
    {
      "form": "deis",
      "tags": [
        "nominative",
        "singular"
      ]
    },
    {
      "form": "dei",
      "tags": [
        "nominative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "dei oblique singular, m (oblique plural deis, nominative singular deis, nominative plural dei)",
      "name": "fro-noun"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "finger",
          "word": "doit"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Anglo-Norman",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Old French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 27 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fro",
          "name": "Anatomy",
          "orig": "fro:Anatomy",
          "parents": [
            "Biology",
            "Medicine",
            "Sciences",
            "Healthcare",
            "All topics",
            "Health",
            "Fundamental",
            "Body"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "she removed a gold ring from her finger",
          "ref": "c. 1150, Thomas d'Angleterre, Le Roman de Tristan, Champion Classiques edition, →ISBN, page 164, line 1980:",
          "text": "Un anel d'or trait de sun dei",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of doit (finger)"
      ],
      "id": "en-dei-fro-noun-3ZtQy2cj",
      "links": [
        [
          "doit",
          "doit#Old_French"
        ]
      ],
      "raw_glosses": [
        "(Anglo-Norman) Alternative form of doit (finger)"
      ],
      "tags": [
        "Anglo-Norman",
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "dei"
}

{
  "forms": [
    {
      "form": "dei oblique singular or",
      "tags": [
        "canonical",
        "masculine"
      ]
    },
    {
      "form": "deis",
      "tags": [
        "oblique",
        "plural"
      ]
    },
    {
      "form": "deis",
      "tags": [
        "nominative",
        "singular"
      ]
    },
    {
      "form": "dei",
      "tags": [
        "nominative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "dei oblique singular, m (oblique plural deis, nominative singular deis, nominative plural dei)",
      "name": "fro-noun"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "finger",
          "word": "doit"
        }
      ],
      "categories": [
        "Anglo-Norman",
        "Old French entries with incorrect language header",
        "Old French lemmas",
        "Old French masculine nouns",
        "Old French nouns",
        "Old French terms with quotations",
        "Pages with 27 entries",
        "Pages with entries",
        "fro:Anatomy"
      ],
      "examples": [
        {
          "english": "she removed a gold ring from her finger",
          "ref": "c. 1150, Thomas d'Angleterre, Le Roman de Tristan, Champion Classiques edition, →ISBN, page 164, line 1980:",
          "text": "Un anel d'or trait de sun dei",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of doit (finger)"
      ],
      "links": [
        [
          "doit",
          "doit#Old_French"
        ]
      ],
      "raw_glosses": [
        "(Anglo-Norman) Alternative form of doit (finger)"
      ],
      "tags": [
        "Anglo-Norman",
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "dei"
}

{
  "called_from": "form_descriptions/1089",
  "msg": "suspicious unhandled suffix in Old French: 'dei oblique singular or', originally 'dei oblique singular or m'",
  "path": [
    "dei"
  ],
  "section": "Old French",
  "subsection": "noun",
  "title": "dei",
  "trace": ""
}

{
  "called_from": "form_descriptions/1089",
  "msg": "suspicious unhandled suffix in Old French: 'dei oblique singular or', originally 'dei oblique singular or m'",
  "path": [
    "dei"
  ],
  "section": "Old French",
  "subsection": "noun",
  "title": "dei",
  "trace": ""
}

{
  "called_from": "form_descriptions/1147",
  "msg": "suspicious related form tags ['masculine', 'canonical']: 'dei oblique singular or' in 'dei oblique singular, m (oblique plural deis, nominative singular deis, nominative plural dei)'",
  "path": [
    "dei"
  ],
  "section": "Old French",
  "subsection": "noun",
  "title": "dei",
  "trace": ""
}