köken: Unknown; first attested in 1739. Attributed by folk etymology to the Latin bridal formula "Ubi tū Gāius ego Gāia" (literally “where you are Gaius, I am Gaia”). More likely a Mexican Spanish term from Classical Nahuatl tōcāyoh (“one who has a name, person of renown”), the possessive form of the noun tōcāitl (“name”), via its possessed form, as in notōcāyoh (“my name-haver, one having my name”);…