"tis" meaning in Ancien français

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de pronoms en ancien français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en ancien français issus d’un mot en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ancien français",
      "orig": "ancien français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du latin teus."
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "pron",
  "pos_title": "Forme de pronom",
  "senses": [
    {
      "form_of": [
        {
          "word": "ton"
        }
      ],
      "glosses": [
        "Cas sujet masculin pluriel de ton."
      ],
      "id": "fr-tis-fro-pron-orNgaTHB"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "tis"
}

{
  "categories": [
    "Formes de pronoms en ancien français",
    "Mots en ancien français issus d’un mot en latin",
    "ancien français"
  ],
  "etymology_texts": [
    "Du latin teus."
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "pron",
  "pos_title": "Forme de pronom",
  "senses": [
    {
      "form_of": [
        {
          "word": "ton"
        }
      ],
      "glosses": [
        "Cas sujet masculin pluriel de ton."
      ]
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "tis"
}