Costner is a surname. Notable people and fictional characters include:
Brandon Costner (born 1987), basketball player Caleb Costner Chris Costner Sizemore (1927–2016), a textbook multiple personality disorder sufferer George Costner (1923–2002), boxer Kevin Costner (born 1955), actor and director Michael Costner Pat Costner Tony Costner
Fictional characters Michael Costner, fictional character from American comic books published by DC Comics
See also
ru:Костнер