Who is this guy, and what kind of name is "Keanu"?
The meaning of the name Keanu is:
Cool Mountain Breeze
The origin is:
Hawaiian
Keanu was named by his father after Keanu's great-grand uncle, Henry Keanu Reeves. It is possible that he was also named after another great-grand uncle, Charles Keaweaheulu Reeves.
K.C. Reeves is the name he went by after arriving in Hollywood when his then agent tried to "de-ethnicize" his name which Keanu did not like at all.