Surname Babau (Babau 
, Mbau 
, Babalus ) , globally, is quite a common cognomen. The last name Babau is characteristic of Kenya, where it is quite a rare surname, Romania, and Portugal, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Kenya, Romania, and Indonesia. Likewise, Babau is the forename as well as the last name.