Last name Oat (Oti 
, Oat 
, 奥特 
) , throughout the world, is a common family name. The surname Oat is characteristic of Sub-Saharan Africa, particularly Ghana, where it is quite a common surname, Nigeria, where it is quite a rare surname, and Kenya. Measured by absolute frequency, it is the most numerous in Nigeria, Ghana, and India. Also, Oat is the forename as well as the last name.