A common surname harkening back to Roman times. At upscale public baths there were teams of people who would run about under the latrines who would reach up with two fingers and wipe the sweat from the patron's taint. This act was known as "frazing". Individuals with this profession were known as "Frazers" hence the name.
Roman #1: What do you do for work, Citizen?
Roman #2: I'm a Frazer.
Roman #1: Now I recognize those fingers!