Last name Plah (ปลา 
, Plah 
) , across the world, is a rare cognomen. The cognomen Plah is habitual in Myanmar, where it is a rare surname, Malaysia, where it is a very rare surname, and the United Kingdom. Measured by absolute frequency, it is the most numerous in Myanmar, Malaysia, and India. More prevalently, Plah is the forename as well as the last name.