Johnclifford turned 58 years old. People possibly related to Johnclifford are Jamieson P Knopf, David Shawn Knopf, Kenneth Andrew Knopf and 6 other people. Johnclifford’s residency is at 1296 Keystone Ct, Riva, Md 21140. Records link phone number (410) 956-3511 with Johnclifford’s details. Businesses linked with Johnclifford are John Clifford Knopf and John Knopf Auctioneer. The birth year was listed as 1966. Gaithersburg, Montgomery Village and Germantown are cities Johnclifford has lived in.