Probably the same as tarshiysh (as the region of the stone, or the reverse); Tarshish, a place on the Mediterranean, hence, the ephithet of a merchant vessel (as if for or from that port); also the name of a Persian and of an Israelite -- Tarshish, Tharshish.
see HEBREW tarshiysh
H8659. Tarshish
II. תַּרְשִׁרשׁ proper name
1. location a distant port, site not certainly known (WklAltor. Forsch. see 445); most Tartessues in Spain Thes (after older authorities) GesIsa i. 719 MeyGeschichte. d. Alt. i, § 281; other views are: Tyrseni (Etruscans) in Italy, WMMHast. DB TARSHISH, Phoenicia RenoufPSBA xvi. 134 ff., Sardinia HalREJ xiii. 14; see also Ency. Bib.TARSHISH; — Tarshish, ᵐ5 usually Θαρς(ε)ις (Isaiah 23:1, 14 Καρχήδων = Carthage); — especially in phrase ת ׳אֳנִיּוֺת Tarshish-ships (large, sea-going vessels, fit to ply to Tarshish) 2:16 (ᵐ5 πλοῖον θαλάσσης), 23:1, 14; 60:9; Ezekiel 27:25; 1 Kings 22:49, "" 2 Chronicles 20:36-37, (where the ships go to ׳ת); ת ׳אֳנִי1k 2 Chron 10:22 (twice in verse) "" 9:21 (אֳנִיּוֺת), + 9:21; (ships go to ׳ת); ׳ת alone Isaiah 23:6; Jonah 1:3 (twice in verse); 4:2 (all with ה locative), Genesis 10:4 "" 1 Chronicles 1:7 (erroneous ה locative), Isaiah 66:19; Psalm 72:10; Jonah 1:3; ׳בַּתתֿ Isaiah 23:10; trading-port Ezekiel 27:12; 38:13, whence comes silver Jeremiah 10:9.
2. masculine a. in Benjamin 1 Chronicles 7:10.
b. Persian noble Esther 1:14; explained By Scheft53as Old Iranian tršus, 'der Gierige.'