Another name of Makar in an early name list of the Valar (PE14/13), apparently a derivative of the root ᴱ√GOÞO having to do with war.
Early Quenya
kos
noun. quarrel, dispute, the matter disputed, legal action
kosartami
collective name. Kosartami
kostorin
masculine name. Kostorin
kosomoko
masculine name. War-hate
kosar
noun. soldier
kosta-
verb. to debate, dispute
kosima
adjective. debatable
kor
noun. war
mahtar
noun. soldier
ohta
noun. war
Qenya name for the people of Rog in an early name list (PE13/104), apparently a combination of kos “war” and the plural of artan “hammer”.