The same (regularly) as tsiyuwn; Tsijon (as a permanent capital), a mountain of Jerusalem -- Zion.
see HEBREW tsiyuwn
H6726. Tsiyyon
צִיּוֺן154 proper name, of a location Σ(ε)ιων; ‚îyyôn, Zion (Syriac , older form, according to LagBn 84, compare 198); — ׳צ 2 Samuel 5:7 +; צִיּוֺ֫נָה Jeremiah 4:6; — stronghold (of Jebusiteas), צ ׳מְצֻדַת captured by David, and made his residence 2 Samuel 5:7 = 1 Chronicles 11:5 (both + דָּוִד עִיר הִיא), on southern part of east hill of Jerusalem, distinct from site of temple 1 Kings 8:1 2 Chronicles 5:2 (both ד ׳מֵעִיר צ ׳הִיא), not elsewhere in narrative, but often in poets and prophets: as name of Jerusalem, from political point of view (sometimes = inhabitants), Amos 6:7 ("" הַרשֹֿׁמְרוֺן), "" יְרוּשָׁלַםִ Micah 3:10, 12 = Jeremiah 26:18; Isaiah 4:3; 30:19; 40:9; 41:27; 52:1; 62:1; 64:9; Zephaniah 3:16; Zechariah 1:14, 17; Psalm 51:20 and (׳בַּתצֿ) Isaiah 52:2; Micah 4:8 ("" ׳בַּתיְֿרוּשׁ ), Lamentations 2:13 ("" id.), also (צ ׳יוֺשֶׁבֶת) Jeremiah 51:35; = Jerusalem also Isaiah 14:32; 33:5+, so especially in phrase צ ׳בְּנוֺת 3:16-17, 4:4; Song of Solomon 3:11, צ ׳בְּנֵי Lamentations 4:2; Joel 2:23; Psalm 149:2 ("" יִשְׂרָזֵל ), cf . Zechariah 9:13, צ ׳יָלְדָה אֶתבָּֿנֶיהָ Isaiah 66:8, and even ׳הַרצֿ 2 Kings 19:31 = Isaiah 37:32 (both "" ׳יְרוּשׁ ), 29:8 ("" אַרִיאֵל 29:7), Obadiah 17, 21; Psalm 48:12 ("" בְּנוֺת יְהוֺדָה 125:1; so also צ ׳הַרבַּֿת Isaiah 16:1; and 10:32 Qr (Kt בית ׃ "" ׳נִּבְעַתיְֿרוּשׁ); compare ׳מְרוֺםצֿ Jeremiah 31:12; in following ׳הַרצֿ might refer to temple-hill Isaiah 10:12 (+׳יְרוּשׁ), 31:4 (+נִּבְעָתָהּ = ׳יְרוּשׁ 31:5), Lamentations 5:18; Joel 3:5 (+ ׳יְרוּשׁ ); specifically of Jerusalem as abode of ׳י and place of his worship Amos 1:2; Isaiah 31:9; Zechariah 8:3; Micah 4:2 = Isaiah 2:3, Joel 4:16; Psalm 102:22; 135:21; 147:12 (all "" ׳יְרוּשׁ), 76:8 ("" שָׁלֵם); particular of sanctuary 20:3 ("" קֹדֶשׁ), 14:7 = Psalm 53:7+; of Jerusalem ׳הַרצֿ 48:3 ("" מֶלֶח קִרְיַת רָב֑), 78:68 ("" יְהוּדָה שֵׁבֶט), Isaiah 24:23 ("" ׳יְרוּשׁ), etc.; צ ׳הַרֲרֵי in same sence Psalm 133:3; particularly of sanctuary Isaiah 4:5 and ("" הַרקָֿדְשִׁי) Joel 2:1; Joel 4:17; צ ׳קָדְשִׁי הַרֿ Psalm 2:6 is seat of king. — See also צ ׳ישֶׁבֶת ׳הַהרצֿ, ׳בַּתצֿ,, below בַּת,יָשַׁב הַר, .
צָיוֺן see ציה. צִיּוּן see צוה above.