Targum zu Bereschit 49:8

Jehuda, thou didst make confession in the matter of Tamar: therefore shall thy brethren confess thee, and shall be called Jehudain from thy name. Thy hand shall avenge thee of thy adversaries, in throwing arrows upon them when they turn their backs before thee; and the sons of thy fathers shall come before thee with salutations.

JEHUDA, thee shall all thy brethren praise, and from thy name shall all be called Jehudaee; thy hand shall avenge thee of thy adversaries; all the sons of thy father shall come before thee with salutation.