"Hh." meaning in French

{
  "head_templates": [
    {
      "args": {
        "1": "m-p"
      },
      "expansion": "Hh. m pl (plural only)",
      "name": "fr-proper noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(“Homeric Hymns, hymni Homerici”): h.Hom.",
          "word": "Hymnes homériques"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of Hymnes homériques (“Homeric Hymns, hymni Homerici”): h.Hom."
      ],
      "id": "en-Hh.-fr-name-8KJVWYWC",
      "links": [
        [
          "Hymnes",
          "hymne#French"
        ],
        [
          "homérique",
          "homérique#French"
        ],
        [
          "h.Hom.",
          "h.Hom.#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "masculine",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "Hh."
}

{
  "head_templates": [
    {
      "args": {
        "1": "m-p"
      },
      "expansion": "Hh. m pl (plural only)",
      "name": "fr-proper noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(“Homeric Hymns, hymni Homerici”): h.Hom.",
          "word": "Hymnes homériques"
        }
      ],
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        "French abbreviations",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French pluralia tantum",
        "French proper nouns",
        "French terms spelled with .",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Abbreviation of Hymnes homériques (“Homeric Hymns, hymni Homerici”): h.Hom."
      ],
      "links": [
        [
          "Hymnes",
          "hymne#French"
        ],
        [
          "homérique",
          "homérique#French"
        ],
        [
          "h.Hom.",
          "h.Hom.#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "masculine",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "Hh."
}