Apparently from an unused root meaning to hem in; Akko (from its situation on a bay) -- Accho.
H5910. Akko
עַכּוֺ proper name, of a location Ακχω, Acco, in Asher, Judges 1:31, + Joshua 19:30 (P), reading ׳ע for עֻמָּה ᵑ0, Di Kau Benn Ency. Bib., after ᵐ5 Manuscripts; a seaport north of Carmel (= Acre, Ptolemais), modern `Akka, compare BuhlGeogr. 228 (Egyptian ±A-ka, Ἀκη WMMAs.u.Eur.181; Assyrian Akkû, COTGloss, Tel Amarna Ak-ka).
עכן (√ of following; meaning unknown).