Raja \r(a)-ja\ as a boy's name (also used as girl's name Raja), is a variant of Rajan (Hindi, Sanskrit), and the meaning of Raja is "king".

The baby name Raja sounds like Rajah and Raj. Other similar baby names are Rama, Ras, Kaj, Rabi, Rad, Rafe, Rafi, Rai, Rain, Rajiv, Raul, Raff, Ram, Rahm, Rami, Ramy, Ravi, Ray, Raye, Rae, Rane, Rab, Rojay, Taj and Taji.