First attested in English in the early 14th century,[1] the word "navy" came via Old French navie, "fleet of ships", from the Latin navigium, "a vessel, a ship, bark, boat",[2] from navis, "ship".[3] The word "naval" came from Latin navalis, "pertaining to ship";[4] cf. Greek ???? (naus), "ship",[5] ?????? (nautes), "seaman, sailor".[6] The earliest attested form of the word is in the Mycenaean Greek compound word ????????????????, na-u-do-mo (*naudomoi), "shipbuilders", written in Linear B syllabic script.[n 1]
вот прямо процитировал Вики, которая ссылается на старофранцузский, латынь и греческий, в общем слово пришедшее из давних времен. Я ссылку и название раздела написал в первом ответе.
Источники:
1.Harper, Douglas. "navy". Online Etymology Dictionary.
2.Jump up ^ navigium. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project.
3.Jump up ^ navis. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project.
4.Jump up ^ navalis. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project.
5.Jump up ^ ????. Liddell, Henry George; Scott, Robert; A Greek–English Lexicon at the Perseus Project.
6.Jump up ^ ?????? in Liddell and Scott.