"selljon" meaning in Breton

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de verbes en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Breton",
      "orig": "breton",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "related": [
    {
      "raw_tags": [
        "Vannetais"
      ],
      "word": "sellazan"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "sellis"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Breton léonard",
          "orig": "breton léonard",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Variante de sellis."
      ],
      "id": "fr-selljon-br-verb-pa3qYHoD",
      "raw_tags": [
        "Léonard"
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈsɛl.ʃũn\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "selljon"
}

{
  "categories": [
    "Formes de verbes en breton",
    "breton"
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "related": [
    {
      "raw_tags": [
        "Vannetais"
      ],
      "word": "sellazan"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "sellis"
        }
      ],
      "categories": [
        "breton léonard"
      ],
      "glosses": [
        "Variante de sellis."
      ],
      "raw_tags": [
        "Léonard"
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈsɛl.ʃũn\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "selljon"
}