Yes Pottsie. Remember he changed his name in part 3. He no longer goes by the name his mother gave him. With his people, it is acceptable to go by a new name. Traditionally at coming of age, young children leave behind their childhood and that includes their name. Kirabaros' just happened when he was already an adult. That idea was taken from the Japanese ceremony of the induction of a new maiko or apprentice geisha.
To everyong reading: I will use words that actually mean something in real life but will have changed the meaning for the story. As a spoiler, the word maiko will actually mean the male form of a geisha but they specialize in the dance of swords. They act out the old stories. Just a heads up for all those interested. Chapter five will be up as soon as I can write it.