Irish loch

← Old English lagu (cognate)

← Proto-Indo-European *lókus (inherited)

← Latin lacus (cognate)

← Old Irish loch (inherited)

→ English lough (borrowed)

→ English turlough (mention)

→ Welsh llwch (cognate)

→ German Loch (derived)

→ Irish Lochlann (affix)

→ Irish múnlach (mention)

→ Irish lochán (suffix)