Definition of "whoever" []

• Whatever person or persons: Whoever comes will be welcomed. (pronoun)
• Who: Whoever could have dreamed of such a thing? See Usage Notes at whatever, who. (pronoun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The first is the lack of ability to be notified only when you receive certain kinds of tweets or direct messages and what I mean by 'certain kinds of tweets' are ones that are directed at you, tweets that begin with @whoever, whoever being your username, that way you can keep up with just people who are directing their conversation towards you."
• "And the best usually puts a dent in "whoever is willing to buy" 's wallet."
• "Each time you change point of view, you need to re-engage the reader in whoever is speaking, when they may have already emotionally invested in another character."