Where does “doubleth” come from?

doubleth (English) comes from English doublé, from French doublé, from Middle French double, from Old French doble, from Latin dūplus, from Proto-Italic *duplos — double.

doubleth (English): third-person singular simple present indicative...

Definitions

  1. third-person singular simple present indicative...

Ancestry of “doubleth”, step by step

doubleth traces back through two separate lines of ancestry.

via English doublé

StepLanguageWordMeaning
1EnglishdoubléA compound attack that deceives the opponent's...
2Frenchdoublédouble, brace, pair; double; doublé
3Middle Frenchdouble
4Old Frenchdobledouble
5Latindūplusdouble (twice as much, or as big)
6Proto-Italic*duplosdouble

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Proto-Italic *duplos
doubleth — Etymology, Origin & Word History | Etymology Explorer