Where does “whenceforth” come from?

whenceforth (English) comes from English Forth, from English Fourth, from Middle English fourthe, from Middle English ferthe, from Old English fēorþa, from Proto-West Germanic feurþō, from Proto-Germanic fedurþô — fourth.

whenceforth (English): From which place, time, or point forth; forth...

Definitions

  1. From which place, time, or point forth; forth...

Ancestry of “whenceforth”, step by step

whenceforth traces back through two separate lines of ancestry.

via English Forth

StepLanguageWordMeaning
1EnglishForththat flows for about 47 km (29 miles) from The Trossachs through Stirling to the Firth of Forth on the North Sea
2EnglishFourthThe Fourth of July
3Middle EnglishfourtheAlternative form of ferthe
4Middle Englishferthefourth; One of four equal parts of a whole; a...
5Old Englishfēorþafourth
6Proto-West Germanicfeurþōfourth
7Proto-Germanicfedurþôfourth

via English whence

StepLanguageWordMeaning
1EnglishwhenceFrom where; from which place or source; "The work...
2Middle Englishwhenneswhence
3Old Englishhwanonwhere from; whence
Every word from Proto-Germanic fedurþôEvery word from Proto-West Germanic feurþōEvery word from Old English fēorþa