All over the world, Penu (Penu 
, Пену 
, ปากกา 
) is quite a rare gender-neutral first name. The first name Penu is habitual in Romania, where it is a rare male name, India, where it is a very rare unisex name, and Nigeria. Measured by absolute frequency, it is the most numerous in India, Indonesia, and Nigeria. Likewise, Penu is the last name as well as the forename.