and other classical writers, and in the King James Bible. "thou, thee, thine, thy (prons.)", Kenneth G. Wilson, The Columbia Guide to Standard American English. 1993. Online at Bartleby.com, retrieved 2007-09-12.]]The word thou ( in most dialects) is a second person singular pronoun in English. It is now largely archaic, having been replaced in almost all contexts by you. Thou is the nominative form; the oblique/objective form is thee (functioning as both accusative and dative), and the possessive is thy or thine. Almost all verbs following thou have the endings -st or -est; e.g., "thou goest". In Middle English, thou was sometimes abbreviated by putting a small "u" over the letter thorn: .Originally, thou was simply the singular counterpart to the plural pronoun ye, derived from an ancient Indo-European root. Following a process found in other Indo-European languages, thou was later used to express intimacy, familiarity, or even disrespect while another pronoun, you, the oblique/objec
Source:
http://en.wikipedia.org/wiki/Thou