The use of the relative pronoun trips the greatest number of authors.

Even in the Bible we find the relative wrongly translated:

Whom do men say that I am?--_St. Matthew_.

Whom think ye that I am?--_Acts of the Apostles_.

_Who_ should be written in both cases because the word is not in the
objective governed by say or think, but in the nominative dependent on
the verb _am_.

"_Who_ should I meet at the coffee house t'other night, but my old
friend?"--_Steele_.

"It is another pattern of this answerer's fair dealing, to give us hints
that the author is dead, and yet lay the suspicion upon somebody, I know
not _who_, in the country."--Swift's _Tale of a Tub_.

"My son is going to be married to I don't know _who_."--Goldsmith's
_Good-natured Man_.

The nominative _who_ in the above examples should be the objective
_whom_.

The plural nominative _ye_ of the pronoun _thou_ is very often
used for the objective _you_, as in the following:

"His wrath which will one day destroy _ye both_."--_Milton_.