Jay,
using ---> Geogen Deutschland (Onlinedienst) - christoph.stoepel.net
there is no TOTTENHOFF
But entry DODENHOF or/and DODENHOFF
shows about 140 in Germany, often in the aerea Rotenburg, today Lower Saxony, once a part of the prussian province of Hannover.
use ---> http://gedbas.genealogy.net/ to get more DODENHOF/DODENHOFF in that aerea.
Klaus Meyer