And afterward came out his brother that had the scarlet thread upon his hand,.... By which it was known that he so far came out first; which confirms the remarkable birth of his brother, who notwithstanding got the start of him:and his name was called Zarah; not from "rising", or his coming forth like the rising sun, as is usually observed; but rather from his return, or drawing back his hand, and as it were returning to his mother's womb; and so, according to Hillerus , Zarah, by a transposition of letters, comes from rzx "Chazar", to return: but Jarchi thinks he had his name from the refulgent appearance of the scarlet thread on his wrist.
Onomastic. Sacr. p. 372.