Where does “Hennegau” come from?

Hennegau (German) comes from German gau, from Middle High German göu, from Old High German gawi, from Proto-Germanic *gawi, from Proto-Germanic gawją, from Proto-Germanic gaawja, from Proto-Germanic ga-, from Proto-Indo-European ḱóm — resin, gum; to say, speak.

Ancestry of “Hennegau”, step by step

Hennegau traces back through two separate lines of ancestry.

via German gau

StepLanguageWordMeaning
1Germangau
2Middle High Germangöushire, district
3Old High Germangawi
4Proto-Germanic*gawi
5Proto-Germanicgawjądistrict, shire, region, area
6Proto-Germanicgaawjariverlands, lakeside land
7Proto-Germanicga-Indicates association or togetherness; co-;...
8Proto-Indo-Europeanḱómbeside, near, by, with
9Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
10Middle Englishkyt
11Germankittputty certain kinds of cement used for fixing e.g. window panes
12Old High Germankuti
13Proto-West Germanickwidugum, resin
14Proto-Germanickweduzresin
15Proto-Indo-Europeangʷet-resin, gum; to say, speak

via German henne

StepLanguageWordMeaning
1Germanhennehen female chicken
2Middle High Germanhenne
3Old High Germanhennahen
4Proto-Germanic*hannju
5Proto-Germanichanjōhen
6Proto-Indo-Europeankeh₂n-to sing
Every word from Proto-Indo-European gʷet-Every word from Proto-Germanic kweduzEvery word from Proto-West Germanic kwidu
Hennegau — Etymology, Origin & Word History | Etymology Explorer