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signor vs. signer

[seen-yawr, -yohr, sin-yawr, -yohr, see-nyawr] / ˈsin yɔr, -yoʊr, sɪnˈyɔr, -ˈyoʊr, siˈnyɔr /
Also signior

noun

plural

signors,

plural

signori
  1. a conventional Italian term of address or title of respect for a man, either used separately or prefixed to the name. Sig., sig.

[sahy-ner] / ˈsaɪ nər /

noun

  1. a person who signs.

  2. a person who writes their name, as in token of agreement.

  3. a person who communicates by or interprets into sign language.