Where does “brec'hioù” come from?

brec'hioù (Breton) comes from Breton brec'h, from Latin bracchium, from Ancient Greek βραχίων, from Ancient Greek βραχύς, from Proto-Indo-European mréǵʰus, from Proto-Indo-European mreǵʰ- — short.

Definitions

Ancestry of “brec'hioù”, step by step

Step	Language	Word	Meaning
1	Breton	brec'h	arm
2	Latin	bracchium	forearm; arm; limb of an animal
3	Ancient Greek	βραχίων	the arm, the shoulder; comparative degree of...
4	Ancient Greek	βραχύς	short, brief; short, small, little; few
5	Proto-Indo-European	mréǵʰus	short; brief
6	Proto-Indo-European	mreǵʰ-	short

Every word from Proto-Indo-European mreǵʰ- →Every word from Proto-Indo-European mréǵʰus →Every word from Ancient Greek βραχύς →