"-ёв" meaning in Russian

{
  "forms": [
    {
      "form": "-jóv",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "suffix"
      },
      "expansion": "-ёв • (-jóv)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "-ev",
          "word": "-ев"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "roman": "Gorbačóv",
          "word": "Горбачёв"
        },
        {
          "roman": "Xruščóv",
          "word": "Хрущёв"
        }
      ],
      "glosses": [
        "Alternative form of -ев (-ev)"
      ],
      "id": "en--ёв-ru-suffix-5Pbi3whD",
      "links": [
        [
          "-ев",
          "-ев#Russian"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "-ёв"
}

{
  "derived": [
    {
      "roman": "Gorbačóv",
      "word": "Горбачёв"
    },
    {
      "roman": "Xruščóv",
      "word": "Хрущёв"
    }
  ],
  "forms": [
    {
      "form": "-jóv",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "suffix"
      },
      "expansion": "-ёв • (-jóv)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "-ev",
          "word": "-ев"
        }
      ],
      "categories": [
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian suffixes"
      ],
      "glosses": [
        "Alternative form of -ев (-ev)"
      ],
      "links": [
        [
          "-ев",
          "-ев#Russian"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "-ёв"
}