Explain with the help of a suitable example the naming

Explain with the help of a suitable example the naming of a restriction endonuclease.

Naming of Restriction Enzymes The convention for naming these enzymes proceeds in a way that the first letter of the name comes from the genus and the second two letters come from the species of prokaryotic cell from which they were isolated, e.g. Eco RI comes from E.coli RY13.
The letter ‘R’ is derived from the name of strain. Roman numbers following the names, indicate the order in which the enzymes were isolated from that strain of bacteria.