Spelling of a name

An Admin needs to change the name from Randal "Tex" Cobb to Randall "Tex" Cobb, with 2 L's as it is incorrectly spelt.

(https://www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=Randall+%22Tex%22+Cobb)

Many Thanks.