Where does “bellylaugh” come from?

bellylaugh (English) comes from English belly, from Middle English bely, from Old English bielġ, from Proto-West Germanic *balgi, from Proto-Germanic balgiz, from Proto-Indo-European bʰelǵʰ-, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

Ancestry of “bellylaugh”, step by step

bellylaugh traces back through two separate lines of ancestry.

via English belly

StepLanguageWordMeaning
1EnglishbellyThe abdomen, especially a fat one; The stomach;...
2Middle Englishbelybelly
3Old Englishbielġbag
4Proto-West Germanic*balgileather bag
5Proto-Germanicbalgizbag
6Proto-Indo-Europeanbʰelǵʰ-to swell
7Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
8Proto-Indo-Europeanbʰōl-

via English laugh

StepLanguageWordMeaning
1EnglishlaughAn expression of mirth particular to the human...
2Middle EnglishlaughenTo laugh; to break out in laughter or laughing;...
3Old Englishhlæhhan
4Proto-West Germanichlahhjanto laugh
5Proto-Germanichlahjanąto laugh
6Proto-Indo-Europeanklek-to laugh, cackle
Every word from Proto-Indo-European bʰōl-Every word from Proto-Indo-European bʰel-Every word from Proto-Indo-European bʰelǵʰ-