Perhaps from Dutch schreef line from Middle Dutch scrÄve from scriven to write from Latin scrÄ«bere ; see skrÄ«bh- in Indo-European roots.
Gastroenterologist or Hepatologist. A doctor who specializes on the liver is a hepatologist. Not to be confused with a herpatologist, who studies snakes. The answer depends on the type of problem. In our area, gastroenterologists treat most liver problems, but sometimes the treatment of hepatitis is done primarily by infectious disease specialists.
If you have a complicated liver disease such as hepatitis, cirrhosis or cancer, the GP will usually refer you to an internal medicine doctor or a hepatologist where they can diagnose and treat you more accurately.