וְאַחַר֙ יָצָ֣א אָחִ֔יו אֲשֶׁ֥ר עַל־יָד֖וֹ הַשָּׁנִ֑י וַיִּקְרָ֥א שְׁמ֖וֹ זָֽרַח׃ (ס)
And afterward came out his brother, that had the scarlet thread upon his hand; and his name was called Zerah.
Targum Jonathan on Genesis
And afterward came forth his brother, upon whose hand was bound the scarlet thread, and she called his name Zarach.