Where does “Rucka” come from?

Rucka (English) comes from Serbo-Croatian ručka, from Serbo-Croatian rúka, from Proto-Slavic rǫkà, from Proto-Balto-Slavic ránkāˀ, from Proto-Indo-European wrenk-, from Latvian wer- — to turn, to bend.

Ancestry of “Rucka”, step by step

Step	Language	Word	Meaning
1	Serbo-Croatian	ručka	handle, helve, haft
2	Serbo-Croatian	rúka	arm
3	Proto-Slavic	rǫkà	hand; arm
4	Proto-Balto-Slavic	ránkāˀ	hand, arm
5	Proto-Indo-European	wrenk-	to turn, twist, bend
6	Latvian	wer-	to turn, to bend

Every word from Latvian wer- →Every word from Proto-Indo-European wrenk- →Every word from Proto-Balto-Slavic ránkāˀ →