ho (Greek #3588)
the definite article; the (sometimes to be supplied, at others omitted, in English idiom)
KJV usage: the, this, that, one, he, she, it, etc.
Pronounce: ho
Origin: ἡ (hay), and the neuter τό (to) in all their inflections
hos (Greek #3739)
the relatively (sometimes demonstrative) pronoun, who, which, what, that
KJV usage: one, (an-, the) other, some, that, what, which, who(-m, -se), etc. See also 3757.
Pronounce: hos
Origin: ἥ (hay), and neuter ὅ (ho) probably a primary word (or perhaps a form of the article 3588)
ean (Greek #1437)
a conditional particle; in case that, provided, etc.; often used in connection with other particles to denote indefiniteness or uncertainty
KJV usage: before, but, except, (and) if, (if) so, (what-, whither-)soever, though, when (-soever), whether (or), to whom, (who-)so(-ever). See 3361.
Pronounce: eh-an'
Origin: from 1487 and 302