The Name Chuck is usually a Nickname for Charles. For Carlos Ray "Chuck" Norris, according to Wikipedia, Chuck Norris got the nickname 'Chuck' during his service as an Air policemen for the American Air force between 1958-1962, also when Chuck Norris started training in Tang Soo Do and later founded the Chun kun do form or universal way.
The name Chuck is a diminutive form of the name Charles. It is commonly used as a nickname for someone named Charles or a variation of Charles, such as Chuck being short for Chuckie.
Chuck Skull's birth name is Chuck Skull Sibaja.
Chuck Vinson's birth name is Chuck Rallen Vinson.
Chuck Paul's birth name is Chuck Paul Paolini.
Kenneth Chuck's birth name is Man Hing Chuck.
Marlowe Chuck's birth name is Menwai Marlow Chuck.
Chuck = Kale
Carlos Ray "Chuck" Norris was the original name.
Chuck Saale's birth name is Charles Saale.
Chuck Biscuits's birth name is Charles Montgomery.
Chuck Rowland's birth name is Charles Rowland.
Chuck Niles's birth name is Charles Neidel.