Given the following context:

Captain Kirk Redgrave and his first mate, Flint Weaver, are two pirates who set out to be the fiercest pirates on the Great Sea (the Great Salt Lake). The movie begins with a man in white using a metal detector on the beach. He happens upon a sleeping Kirk and begins to tell the audience the legend of a young man who wanted to find his fortune. On his journey, the young man meets a mapmaker and ends up at a cursed mountain cave filled with treasure. While taking the riches, he is attacked by the skeleton in the cave and killed, ripping the map in his attempt to escape.
Back at the Great Sea, after  Flint and Kirk "raid" a boat, Kirk finds a map tucked into the inside of a shoe Flint fished out of the lake. The two can't help but plunder an unattended corn stall on their way to bike to the library to find the origin of the mysterious map. Once there, a librarian aids the boys by telling them "either it's real, or it's fake". She shows them a page in an encyclopedia containing the second half of the map. Unfortunately, the book is from "General Reference" and cannot be checked out, much to Kirk's irritation. While trying to tear the page out of the book, Kirk notices an unattended photo copying machine, which they use to photocopy the page and their faces. Later, Kirk becomes frustrated and throws away the map, complaining he can't decipher it because a "pirate map is only good to the pirate who made it". Flint saves the map.

answer the following question:

What are the last names of the men who raid a boat? 

Weaver