hawkshaw (n.)

"detective," 1866, U.S. slang, from name of the detective in "The Ticket-of-Leave Man," 1863 play by English dramatist Tom Taylor (1817-1880); it later was used in the comic strip "Hawkshaw the Detective" (1913-1947) by U.S. cartoonist Gus Mager (1878-1956). The surname is attested from late 13c., from a place name in Lancashire, with shaw "undergrowth, woodland, scrub," from Old English sceaga.