"filz" meaning in Middle French

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fr",
            "2": "fils"
          },
          "expansion": "French: fils",
          "name": "desc"
        }
      ],
      "text": "French: fils"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "frm",
        "2": "fro",
        "3": "fils"
      },
      "expansion": "Old French fils",
      "name": "der"
    },
    {
      "args": {
        "1": "frm",
        "2": "la",
        "3": "filius"
      },
      "expansion": "Latin filius",
      "name": "der"
    }
  ],
  "etymology_text": "Old French fils and its variants, from Latin filius",
  "forms": [
    {
      "form": "filz",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "frm",
        "10": "{{{f}}}",
        "11": "",
        "12": "{{{f}}}s",
        "2": "noun",
        "3": "",
        "4": "",
        "5": "plural",
        "6": "filz",
        "7": "",
        "8": "{{{pl2}}}",
        "9": "",
        "f1accel-form": "p",
        "g": "m",
        "g2": "",
        "head": "",
        "sort": ""
      },
      "expansion": "filz m (plural filz)",
      "name": "head"
    },
    {
      "args": {
        "1": "m",
        "2": "filz"
      },
      "expansion": "filz m (plural filz)",
      "name": "frm-noun"
    }
  ],
  "lang": "Middle French",
  "lang_code": "frm",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Middle French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "frm",
          "name": "Family",
          "orig": "frm:Family",
          "parents": [
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "9 25 33 16 16",
          "kind": "other",
          "name": "Old French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "4 13 67 8 8",
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "2 15 58 12 12",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "english": "And the problem that bothered him was to know whether he should cry for the death of his wife, or laugh for the birth of his son.",
          "ref": "1532, François Rabelais, Pantagruel:",
          "text": "Et le doubte que troubloit son entendement estoit assavoir s'il devoit plorer pour le deuil de sa femme, ou rire pour la joye de son filz.",
          "type": "quote"
        }
      ],
      "glosses": [
        "son (male child)"
      ],
      "id": "en-filz-frm-noun-Joh3lwGS",
      "links": [
        [
          "son",
          "son"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "filz"
}

{
  "categories": [
    "Old French entries with incorrect language header",
    "Old French non-lemma forms",
    "Old French noun forms",
    "Pages with 3 entries",
    "Pages with entries"
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fr",
            "2": "fils"
          },
          "expansion": "French: fils",
          "name": "desc"
        }
      ],
      "text": "French: fils"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "frm",
        "2": "fro",
        "3": "fils"
      },
      "expansion": "Old French fils",
      "name": "der"
    },
    {
      "args": {
        "1": "frm",
        "2": "la",
        "3": "filius"
      },
      "expansion": "Latin filius",
      "name": "der"
    }
  ],
  "etymology_text": "Old French fils and its variants, from Latin filius",
  "forms": [
    {
      "form": "filz",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "frm",
        "10": "{{{f}}}",
        "11": "",
        "12": "{{{f}}}s",
        "2": "noun",
        "3": "",
        "4": "",
        "5": "plural",
        "6": "filz",
        "7": "",
        "8": "{{{pl2}}}",
        "9": "",
        "f1accel-form": "p",
        "g": "m",
        "g2": "",
        "head": "",
        "sort": ""
      },
      "expansion": "filz m (plural filz)",
      "name": "head"
    },
    {
      "args": {
        "1": "m",
        "2": "filz"
      },
      "expansion": "filz m (plural filz)",
      "name": "frm-noun"
    }
  ],
  "lang": "Middle French",
  "lang_code": "frm",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Middle French countable nouns",
        "Middle French entries with incorrect language header",
        "Middle French lemmas",
        "Middle French masculine nouns",
        "Middle French nouns",
        "Middle French terms derived from Latin",
        "Middle French terms derived from Old French",
        "Middle French terms with quotations",
        "Pages with 3 entries",
        "Pages with entries",
        "frm:Family"
      ],
      "examples": [
        {
          "english": "And the problem that bothered him was to know whether he should cry for the death of his wife, or laugh for the birth of his son.",
          "ref": "1532, François Rabelais, Pantagruel:",
          "text": "Et le doubte que troubloit son entendement estoit assavoir s'il devoit plorer pour le deuil de sa femme, ou rire pour la joye de son filz.",
          "type": "quote"
        }
      ],
      "glosses": [
        "son (male child)"
      ],
      "links": [
        [
          "son",
          "son"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "filz"
}