Romano cheese is a term used in the united states and canada for a class of hard, salty cheese suitable primarily for grating similar to pecorino romano, from which the name is derived. in spite of the name, it should not be confused with genuine pecorino romano which is an italian product recognized and protected by the laws of the european union, though united states law allows romano produced entirely from sheep's milk to be called "pecorino romano".per u.s. food and drug administration regulations, romano cheese can be made from cow, goat, and/or sheep's milk. it must contain less than 34% water and at least 38% milkfat. cream, skim milk and/or dry milk and water can be added or remov...

Source: Wikipedia