Huaranga appears to be Peruvian rather than Spanish, perhaps Inca.
This website gives one explanation of the word huaranga -
http://www.incaperu.org/ant/wamachuko/1993(1).htmlThere you can read that, "The local population was divided into four ranked huarangas (an Inca administrative unit of a thousand households) ..."
I'm not sure that this is the meaning of the name, which was in use as a personal name in the 16th century, when an Inca named Urco Huaranga was around.