Waker
Origin 1
From Middle English wakyr, from Old English wacor, waccor ("watchful, vigilant"), from Proto-Germanic *wakraz ("awake, watchful"), equivalent to wake + -er. Cognate with Scots wakir ("watchful"), Dutch wakker ("awake"), German wacker ("awake, alert, capable, brave"), Swedish vacker ("wakeful, watchful, fair, comely").