Probably for ashtrah; Ashtoreth, the Phoenician goddess of love (and increase) -- Ashtoreth.
see HEBREW ashtrah
H6253. Ashtoreth
עַשְׁתֹּ֫רֶת proper name, of deities ±Aštœreth, < ±Ašt¹rt, ±Aštéreth (see below) (MI17 כמש עשתר; Phoenician עשתרת (+ often in proper names), proper name עשתר עבד CookAcad. Jan.18, 1896 Sabean proper name, of deity עתֿתר see especially OsZMG xx (1866), 279 f. DHMib. xxxvii (1883), 376 FellSab. Gotternamen, ZMG liv (1900), 231 ff., especially 237 ff.; Assyrian Ištar; Old Aramaic, Palmyrene עתר (= עתֿתר) in proper name; in Egyptian ±astirati WMMAs.u.Eur.313; Greek Ἀστάρτη; on their Greek equivalents (e.g. Ἀφροδίτη) compare LewyFremdw. 148, 186 f, 250); — ֶֹ֯ probably artificial, to suggest בּשֶׁת, originally תַּרְתְּ-, תֶּרֶת-, compare Ištar, Ασταρτη, etc.; ׳ע 1 Kings 11:5 2t.; plural תָּרוֺת- Judges 2:13 + 3t.+ רֹת- 1 Samuel 7:4; 31:10 read probably singular (Dr and others); — ±Aštart, ±Aštereth (Ασταρτη, plural Ασταρται, but Judges 10:6; 1 Samuel 7:4 Ασταρωθ), ancient Semitic goddess (with male counterpart in Moabite, Sabean and apparently Phoenician); Phoenician deity, צִדֹנִים אֱלֹהֵי עשׁתרת 1 Kings 11:5, 33, ׳ע צ ׳שִׁקֻּץ 2 Kings 23:13; so probably ע ׳בֵּית 1 Samuel 31:10 (reading singular; see especially Dr); elsewhere plural, of various local goddesses, called עֲשְׁתָּרוֺת (compareAssyrian ilâni u ištarat = gods and Ištars (i.e. goddesses), usually + בעל(יםׅ, as Canaanitish deities Judges 2:13; 10:6; 1 Samuel 7:4; 12:10; "" הַנֵּכָר אֱלֹהֵי 7:3. — See especially DrAshtoreth in HastDB; on Išitar JastrRel. Babylonian passive especially 202 f.; on `Athtar BaeRel. 117 f; on Phoenician on `Aštart PietschmGeschichte. Phön. 184 f.; on ±Ashtoreth BartonJBL x (1891), 73 ff. GFMEncy. Bib.