From the World Book of Dillmans ,published by Halbert's Family Heritage in Bath,Ohio there is listed in Tennessee about 1996, Richard A. Dillman,RR.1,Box220,Sevierville,37862 and in Michigan Richard A. Dillman, 2725 Ashton Dr. Saginaw, 48603--Richard A. Dillman,18860 G Dr. N.,Marshall,48603--Richard S. Dillman,9158 Lake Crst Dr.,Hamburg,48139. These are the only connections that could apply from this printed copyright MCMXCVI.
Wish You Well,
Allen and Harriet Dillman of Elizabethtown, Indiana
I don't know if you are still looking for Emma Dillman or not, if so I wish I would have found this website sooner. Emma passed away a couple months ago. She was my aunt.
If your co-worker needs any information, I'll provide whatever I can.