If you're looking for Rome info of the German or Dutch (or Pennsylvania Dutch) variety, definitely try this book:
"Descendants of Peter Willemse Roome" by P.R. Warner (published 1986)
Bergen Historic Books Inc.
PO Box 182
Dublin, PA 18917
Cost:$76.00

There's a copy of the book at the
Morristown and Morris County Public Library
1 Miller Road
Morristown, NJ 07960

(It's also on Ancestry.com for a subscription cost under Family Histories)

Peter Roome, grandson of Peter Willemse Roome and Hester Van Gelder changed his name to Peter Romer about 1800. He was married to Jane Freeland under the name Roome and then married to Louisa Whitley when his name was Romer and between the wives, he had at least 13 children. His youngest son, William Romer, changed his name to Rome after the Civil War and our family name stayed that way (which made finding these Roomes quite a task!). Perhaps your lost relatives fit into this name-changing family somewhere!