Whoso
Whoso is an archaic English pronoun used to mean "whoever" or "any person who." It appears in Middle English and Early Modern English, most often in religious, legal, or poetic texts. In many instances it stands as a simple subject, and it is sometimes encountered in the fused form whosoever.
Etymology and form: The word is formed by a combination of the interrogative who with the particle
Usage and examples: Whoso may be found in proverbs and poems, such as Sir Thomas Wyatt’s Whoso
Modern status and interpretation: In contemporary English, whoso is rarely used outside literary or historical writing.
See also: whoever, whosoever, archaic English pronouns, early modern English literature.