Where does “cromghlinn” come from?

cromghlinn (Irish) comes from Irish cróm, from Middle Irish cromm, from Old Irish cromb, from Proto-Celtic *krumbos, from Proto-Germanic krumbaz, from Proto-Germanic krumpaz, from Proto-Indo-European gerb-, from Proto-Indo-European ger- — to turn, bend, twist, wind; to tie, bind...

Ancestry of “cromghlinn”, step by step

StepLanguageWordMeaning
1Irishcrómchrome
2Middle Irishcromm
3Old Irishcromb
4Proto-Celtic*krumbosbent, crooked
5Proto-GermanickrumbazAlternative form of *krumpaz
6Proto-Germanickrumpazbent, crooked, curved
7Proto-Indo-Europeangerb-to turn, wind; to shrink, shrivel
8Proto-Indo-Europeanger-to turn, bend, twist, wind; to tie, bind...
Every word from Proto-Indo-European ger-Every word from Proto-Indo-European gerb-Every word from Proto-Germanic krumpaz