Why The Name Moshiach

The Minchas Chinuch (107:8) is unsure if Moshiach will need to be anointed with שמן המשחה.  A king that inherits the kingship doesn’t require anointing, so it should follow that he doesn’t have to be anointed or do we say since the kingship was split and the previous kings would require anointing to have ruled over all of Klal Yisroel, so too Moshiach.

The Metzudos Dovid Zecharyeh 4:14 says explicitly that he requires משיחה: אלה שני בני היצהר – השניות מרמז על שני בני היצהר ר״ל המלך המשיח וכה״ג אשר ימשחו בשמן המשחה זה למלכות וזה לכהונה גדולה.
                                                    Mishmar Halevi Berachos siman 114

Simply, that’s why he is called Moshiach; for he is anointed, as the navi often calls kings משיח for they are anointed.  If Moshiach doesn’t require anointing why he have such a title?  Perhaps Moshiach means like the derash on (Korach 18:8) למשחה – לגדולה (footnote 59 to Likutay Sichos volume 23 Pinchas sicha 2.)