Raja is also used as a feminine name in South and Southeast Asian languages. However, it's more common for males. So, I think that the "Gender" of this name should be changed from "Masculine" to "Masculine & Feminine". Some evidence for this is that Raja is also used as a name element in unisex and feminine South Asian names, such as Rajalakshmi/Rajalakshmy/Rajalaxmi/Rajalaksmi/Rajyalakshmi.Source: https://forebears.io/forenames/raja
Source: https://forebears.io/forenames/raja