1) Any old person 2) Anyone that 3) Anyone who 4) No one in particular 5) Xavier and family 1) Anybody 2) Anyone 
• (pron.) Whatever person; any person who; be or she who; any one who; as, he shall be punished, whoever he may be.
Who·ev'er pron. Whatever person; any person who; be or she who; any one who; as, he shall be punished, whoever he may be. ' Whoever envies or repines.' Milton. ' Whoever the king favors.' Shak. 
This extension of who (see above) along with its object form whomever is attended by the same uncertainties as who along with whom, and is discussed in the same sources. (See the relevant section at Who.) Undisputed usage: Give it to whoever wants it. Undisputed usage: Give it to whoever you think should have it. Undisputed usage: Give it to whomev...