Definition
who? (occasionally, by a peculiar idiom, of things); also (indefinitely) whoever; often used in oblique construction with prefix or suffix
Derivation
an interrogative pronoun of persons, as H4100 (מָה) is of things,
King James Version Usage
any (man), [idiom] he, [idiom] him, [phrase] O that! what, which, who(-m, -se, -soever), [phrase] would to God.