etymology of "Sherlock" ; Conan Doyle

From: Richard Fangnail (richardfangnail_at_excite.com)
Date: 03/16/05 

Date: 16 Mar 2005 10:39:19 -0800

"Sherlock" was apparently the name of a cricket player but I don't know
whether it was his first or last name. I wonder if it's derived from
Shylock.

Some British people have last names that are not connected with a dash,
like Conan Doyle or Alan Nunn May, or Andrew Loog Oldham, the Rolling
Stones producer. Anything interesting to say?