"-ga" meaning in Ojibwe

{
  "head_templates": [
    {
      "args": {
        "1": "oj",
        "2": "noun",
        "3": "obligatorily possessed",
        "cat2": "animate nouns",
        "cat3": "dependent animate nouns"
      },
      "expansion": "-ga (obligatorily possessed)",
      "name": "head"
    }
  ],
  "lang": "Ojibwe",
  "lang_code": "oj",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ojibwe entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 9 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "oj",
          "name": "Family",
          "orig": "oj:Family",
          "parents": [
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "my mother",
          "word": "ninga"
        },
        {
          "english": "your mother",
          "word": "giga"
        },
        {
          "english": "his/her/their mother",
          "word": "ogiin"
        }
      ],
      "glosses": [
        "mother"
      ],
      "id": "en--ga-oj-noun-zwYi7ypm",
      "links": [
        [
          "mother",
          "mother"
        ]
      ],
      "synonyms": [
        {
          "word": "-maamaay"
        }
      ],
      "tags": [
        "possessed-form"
      ]
    }
  ],
  "word": "-ga"
}

{
  "derived": [
    {
      "english": "my mother",
      "word": "ninga"
    },
    {
      "english": "your mother",
      "word": "giga"
    },
    {
      "english": "his/her/their mother",
      "word": "ogiin"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "oj",
        "2": "noun",
        "3": "obligatorily possessed",
        "cat2": "animate nouns",
        "cat3": "dependent animate nouns"
      },
      "expansion": "-ga (obligatorily possessed)",
      "name": "head"
    }
  ],
  "lang": "Ojibwe",
  "lang_code": "oj",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Ojibwe animate nouns",
        "Ojibwe dependent animate nouns",
        "Ojibwe entries with incorrect language header",
        "Ojibwe lemmas",
        "Ojibwe nouns",
        "Pages with 9 entries",
        "Pages with entries",
        "oj:Family"
      ],
      "glosses": [
        "mother"
      ],
      "links": [
        [
          "mother",
          "mother"
        ]
      ],
      "tags": [
        "possessed-form"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "-maamaay"
    }
  ],
  "word": "-ga"
}