You can try one thing ....
1. go to google -> image search -> type the persons name . check if the keyword is ok through a trial and error method .
2. in the address bar ,you willl find a long url string . copy that url.
3. get / download a offline site browser like httrack that downloads from a specific url / site . say create new offline site ,paste the link from the previous step.
4. there before starting it , in the filetype options give options to download onlyimage files(extensions of your choice ) ,and depth as 20 etc (not sure ,so try this once and see whats the right depth you shud go )
5. when the downloads are done , you would have a folder ( folder locations corresponding to what you put in the setting in previous step ) of only images of that person of your choice .
Try that out and let us know .... 8 )