A name that Yanks might see as overly British, but combined with the right surname, it does have a measure of Sherlock Holmesian dash via NigelBruce, who played the original Dr. Watson to Basil Rathbone's SherlockHolmes.
Nigel Thornberry, the father on The Wild Thornberrys
Nigel Bottom, character in musical "Something Rotten"
Dr. Nigel Fenway, from the TV series "Threshold"
NigelBaker, one of SteveMartin's twelve children in "Cheaper by the Dozen"
Dr. Nigel Townsend, character on the tv show "Crossing "Jordan"
Nigel, antagonist cockatoo in the animated movie "Rio"
Nigel, pelican in Pixar's "Finding Nemo"
Nigel Tufnel, lead guitarist of fictional band Spinal Tap
Nigel Uno (a.k.a. Numbah One), one of the main characters on Codename: Kids Next Door