Perhaps you should try some spelling variations:
dewhitaker » whitaker (Expand Search)
rawhittaker » whittaker (Expand Search), rwhittaker (Expand Search), rwhitaker (Expand Search)
mwhittaker » whittaker (Expand Search), whitaker (Expand Search)
rwhitaker » whitaker (Expand Search), whittaker (Expand Search)
rrwhitaker » rwhitaker (Expand Search), rwhittaker (Expand Search), whitaker (Expand Search)
awhittaker » whittaker (Expand Search), whitaker (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: david a. (dewhitaker OR (((rawhittaker OR (mwhittaker OR rwhitaker)) OR rrwhitaker) OR awhittaker))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "david a. (dewhitaker OR (((rawhittaker OR (mwhittaker OR rwhitaker)) OR rrwhitaker) OR awhittaker))".
• Adding a wildcard symbol may retrieve word variants: david a. (dewhitaker OR (((rawhittaker OR (mwhittaker OR rwhitaker)) OR rrwhitaker) OR awhittaker))*.