"намъ" meaning in Russian

{
  "forms": [
    {
      "form": "nam",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "pronoun form"
      },
      "expansion": "намъ • (nam)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "pron",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(nam), dative of мы (my, “we”)",
          "word": "нам"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian pre-1918 spellings",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Pre-1918 spelling of нам (nam), dative of мы (my, “we”)"
      ],
      "id": "en-намъ-ru-pron-rD6Laftt",
      "links": [
        [
          "нам",
          "нам#Russian"
        ],
        [
          "мы",
          "мы#Russian"
        ]
      ],
      "tags": [
        "alt-of",
        "dated"
      ]
    }
  ],
  "word": "намъ"
}

{
  "forms": [
    {
      "form": "nam",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "pronoun form"
      },
      "expansion": "намъ • (nam)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "pron",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(nam), dative of мы (my, “we”)",
          "word": "нам"
        }
      ],
      "categories": [
        "Pages with 4 entries",
        "Pages with entries",
        "Russian entries with incorrect language header",
        "Russian non-lemma forms",
        "Russian obsolete forms",
        "Russian pre-1918 spellings",
        "Russian pronoun forms"
      ],
      "glosses": [
        "Pre-1918 spelling of нам (nam), dative of мы (my, “we”)"
      ],
      "links": [
        [
          "нам",
          "нам#Russian"
        ],
        [
          "мы",
          "мы#Russian"
        ]
      ],
      "tags": [
        "alt-of",
        "dated"
      ]
    }
  ],
  "word": "намъ"
}