Sherlock
early 20th century: from Sherlock Holmes (see Holmes, Sherlock).
wiktionary
Supposedly from an Old English scir- lock(“bright-lock”). One of a group of surnames originally denoting hair colour, parallel to Blacklock, Harlock (Old English har(“grey”)), Silverlock.
In the computing verb sense, refers to the software Sherlock, which came to replicate some of the features of an earlier complementary program called Watson [1].
etymonline
Sherlock
masc. proper name, literally "fair-haired," from Old English scir "bright" + locc "lock of hair." Slang for "private detective, perceptive person" (the latter often ironic) is attested from 1903, from A.C. Doyle's fictional character Sherlock Holmes (full name in this sense used from 1896; Holmes debuted in 1887 and was popular by 1892).
