Here are some possibilities for what you might be looking for:
* Heroonyms: This is a possible misspelling of "heronym," which is a rare term for a name that is similar to another name. For example, "John Smith" could be considered a heronym of "Jane Smith."
* Heronim: This is not a recognized word in English, but it might be a name or a made-up word.
* Hieronyms: This word is also not recognized in English. It might be a misspelling of "hieronyms," a possible term for names that are similar in meaning or origin.
* Homonyms: This is a commonly recognized word that refers to words that sound the same but have different meanings and sometimes different spellings (e.g., "to," "too," and "two").
* Heteronyms: These are words that have the same spelling but different pronunciations and meanings (e.g., "bow" for a knot and "bow" for a weapon).
If you can provide more context or the original source where you saw "hereonyms," I might be able to help you find the correct word or term.