You could search more bulletin boards and mailing lists, not only for the surname but also for DENMARK, SCHLESWIG, TONDER, etc. You're welcome to look at my data at:
http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=SRCH&...Good luck.
Lee James Irwin
FamilyMatters Research
FamilyMatters2U@gmail.coom