byname /ˈbaɪˌneɪm/noun 7verb 1forms 3 noun7 •Any secondary name. •A formal epithet for a god or goddess, used in rituals in Heathenry. •Synonym of epithet, a descriptive and distinguishing additional name.Lions-heart, is... the by-name of K. Richard. — 1631 •(dialect, UK) Synonym of pseudonym, a second name used to disguise authorship etc. •(no longer used) Synonym of nickname, an informal personal name. •(no longer used) Synonym of surname, a hereditary distinguishing additional name.Some of these by-names... remained many years after to them, and theirs; amongst which Plantagenist was entailed on the Royal bloud of England. — 1655 •(no longer used, historical) Synonym of cognomen, a personal or hereditary additional name in ancient Roman contexts.Eutropius... gives him the additional name of Crinitus, perhaps a by-name of his family. — 1865 verb1 •(no longer used) To assign a byname to. formsbynamed · bynaming · bynames