whoever
From Longman Dictionary of Contemporary Englishwhoeverwho‧ev‧er /huːˈevə $ -ˈevər/ ●●○ S3 pronoun 1 EVERYONEused to say that it does not matter who does something, is in a particular place etc I’ll take whoever wants to go. When you’re done with the book, just give it to Kristin or Shelley or whoever.2 PERSON/PEOPLEused to talk about a specific person or people, although you do not know who they are Whoever is responsible for this will be punished.3 → whoever he/she is4 SURPRISEDused to mean ‘who’ at the beginning of a question to show surprise or anger Whoever would do a thing like that to an old woman?Examples from the Corpuswhoever• Whoever could be calling at this time of night?• Give these clothes to whoever needs them.