"ef" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*es"
      },
      "expansion": "Proto-Celtic *es",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "ine-pro",
        "3": "*éy"
      },
      "expansion": "Proto-Indo-European *éy",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Celtic *es or *ēs, from Proto-Indo-European *éy.",
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "pronoun",
        "cat2": "personal pronouns"
      },
      "expansion": "ef",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "pron",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 13 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh personal pronouns",
          "parents": [
            "Personal pronouns",
            "Pronouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh pronouns",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "he; him"
      ],
      "id": "en-ef-cy-pron-xb3Nf854",
      "links": [
        [
          "he",
          "he"
        ],
        [
          "him",
          "him"
        ]
      ],
      "raw_glosses": [
        "(literary) he; him"
      ],
      "synonyms": [
        {
          "word": "e"
        },
        {
          "tags": [
            "colloquial"
          ],
          "word": "o"
        }
      ],
      "tags": [
        "literary"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/eːv/"
    },
    {
      "rhymes": "-eːv"
    }
  ],
  "word": "ef"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*es"
      },
      "expansion": "Proto-Celtic *es",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "ine-pro",
        "3": "*éy"
      },
      "expansion": "Proto-Indo-European *éy",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Celtic *es or *ēs, from Proto-Indo-European *éy.",
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "pronoun",
        "cat2": "personal pronouns"
      },
      "expansion": "ef",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "pron",
  "senses": [
    {
      "categories": [
        "Pages with 13 entries",
        "Pages with entries",
        "Rhymes:Welsh/eːv",
        "Rhymes:Welsh/eːv/1 syllable",
        "Welsh entries with incorrect language header",
        "Welsh lemmas",
        "Welsh literary terms",
        "Welsh personal pronouns",
        "Welsh pronouns",
        "Welsh terms derived from Proto-Celtic",
        "Welsh terms derived from Proto-Indo-European",
        "Welsh terms inherited from Proto-Celtic",
        "Welsh terms inherited from Proto-Indo-European"
      ],
      "glosses": [
        "he; him"
      ],
      "links": [
        [
          "he",
          "he"
        ],
        [
          "him",
          "him"
        ]
      ],
      "raw_glosses": [
        "(literary) he; him"
      ],
      "tags": [
        "literary"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/eːv/"
    },
    {
      "rhymes": "-eːv"
    }
  ],
  "synonyms": [
    {
      "word": "e"
    },
    {
      "tags": [
        "colloquial"
      ],
      "word": "o"
    }
  ],
  "word": "ef"
}