What word or phrase does your mother always say?
early 13c., from Old French persone "human being, anyone, person" (12c., Modern French personne) and directly from Latin persona "human being, person, personage; a part in a drama, assumed character," originally "mask, false face," such as those of wood or clay worn by the actors in later Roman theater. OED offers the general 19c. explanation of persona as "related to" Latin personare "to sound through" (i.e. the mask as something spoken through and perhaps amplifying the voice), "but the long o makes a difficulty ...." Klein and Barnhart say it is possibly borrowed from Etruscan phersu "mask." Klein goes on to say this is ultimately of Greek origin and compares Persephone.
Of corporate entities from mid-15c. The use of -person to replace -man in compounds and avoid alleged sexist connotations is first recorded 1971 (in chairperson). In person "by bodily presence" is from 1560s. Person-to-person first recorded 1919, originally of telephone calls.
person per·son (pûr'sən)
A living human.
The composite of characteristics that make up an individual personality; the self.
The living body of a human.
Physique and general appearance.
An inflectional form (see inflection) of pronouns and verbs that distinguishes between the person who speaks (first person), the person who is spoken to (second person), and the person who is spoken about (third person). The pronoun or verb may be singular or plural. For example:
first person singular: I walk.
second person singular: you walk.
third person singular: he/she/it walks.
first person plural: we walk.
second person plural: you walk.
third person plural: they walk.