Where does “nightlighter” come from?

nightlighter (English) comes from English nightlight, from English night, from Middle English nyght, from Middle English nighte, from Old English nyht, from Proto-West Germanic naht, from Proto-Germanic nahts, from Proto-Indo-European nókʷts — bare, naked.

Ancestry of “nightlighter”, step by step

nightlighter traces back through two separate lines of ancestry.

via English nightlight

StepLanguageWordMeaning
1Englishnightlighta small, dim light or lamp left on overnight;...
2EnglishnightThe period between sunset and sunrise, when a...
3Middle EnglishnyghtAlternative form of nighte; Alternative form of...
4Middle Englishnightenight
5Old EnglishnyhtAlternative form of niht
6Proto-West Germanicnahtnight
7Proto-Germanicnahtsnight
8Proto-Indo-Europeannókʷtsnight
9Proto-Indo-Europeannegʷ-bare, naked

via English ER

StepLanguageWordMeaning
1EnglishERThe statistic "Earned Run"; Initialism of...
2Turkisherearly; brave; man, male
3Ottoman Turkishایرsaddle, a seat for a rider placed on the back of a horse or other animal
4Old Anatolian Turkishایرearly, at a time in advance of the usual or expected event
5Proto-Turkicēdersaddle
Every word from Proto-Indo-European negʷ-Every word from Proto-Indo-European nókʷtsEvery word from Proto-Germanic nahts