Where does “kamerling” come from?

kamerling (Frankish) comes from Dutch kamer, from Middle Dutch cāmere, from Old Dutch kamara, from Latin camera, from Ancient Greek καμάρα, from Proto-Iranian kamarā-, from Proto-Iranian kamárati, from Proto-Indo-Iranian *kmárati — to bend, to curve.

Ancestry of “kamerling”, step by step

kamerling traces back through two separate lines of ancestry.

via Dutch kamer

StepLanguageWordMeaning
1DutchkamerA room, physical chamber in a building; A...
2Middle Dutchcāmereroom, barn, house
3Old Dutchkamara
4LatincameraA chamber in its various senses, "including";...
5Ancient GreekκαμάραAnything with an arched cover such as a covered...
6Proto-Iraniankamarā-something curved
7Proto-Iraniankamárati
8Proto-Indo-Iranian*kmárati
9Proto-Indo-Europeankh₂em-to bend, to curve

via Italian camerlengo

StepLanguageWordMeaning
1Italiancamerlengochamberlain
2Old Italiancamarlingo
Every word from Proto-Indo-European kh₂em-