Where does “mongerer” come from?

mongerer (English) comes from English ER, from Turkish er, from Ottoman Turkish ایر, from Old Anatolian Turkish ایر, from Proto-Turkic ēder — saddle.

Ancestry of “mongerer”, step by step

mongerer traces back through two separate lines of ancestry.

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

via English monger

StepLanguageWordMeaning
1EnglishmongerA dealer in a specific commodity; A person...
2Middle EnglishmongereA retailer; a merchant
3Old Englishmāngeretrader, merchant, dealer, monger
4Old Englishmāngianto trade, traffic, do as a monger
Every word from Proto-Turkic ēderEvery word from Old Anatolian Turkish ایرEvery word from Ottoman Turkish ایر