1505-15; Anglo-Irish spelling of Irishloch lake; compare Middle Englishlow, lough(e), logh(e), Old English (Northumbrian) lūh < British Celtic*lux- (> Welshllwch (obsolete) lake, Old Bretonluh,Bretonlouc’h), apparently < early Irish; see loch
Examples from the web for lough
Smoke curled lazily from factory chimneys, and small and bigger boats ploughed their ways up and down the lough.