From BiblePortal Wikipedia

Watson's Biblical & Theological Dictionary [1]

a people sent by the kings of Assyria to inhabit the country of Samaria, in the room of those Israelites who had been removed beyond the Euphrates,  Ezra 5:6 . They, with the other Samaritans, opposed the rebuilding of the walls of Jerusalem,  Ezra 4:9 .

Holman Bible Dictionary [2]

 Ezra 4:9 Ezra 5:6 Ezra 6:6 Ezra 4:9  Ezra 5:6  Ezra 6:6

Easton's Bible Dictionary [3]

 Ezra 5:6 6:6

Hastings' Dictionary of the Bible [4]

Apharsachites . See next article.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [5]

(Chald. Apharsekaye', אֲפִרְסְכָיֵא ; Sept. Ἀφαρσαχαῖοι ,  Ezra 5:6;  Ezra 6:6) or Aphar'sathchites (Chald. Apharsathkaye', אֲפִרְסִתְכָיֵא  ; Sept. Ἀφαρσαθαχαῖοι ,  Ezra 4:9), the name of the nation (or one of the nations) to which belonged one portion of the colonists whom the Assyrian king planted in Samaria, in place of the expatriated northern tribes, and who violently opposed the Jews in rebuilding Jerusalem. Schulthess (Parad. p. 362) identifies the "Apharsachites" with the Persian, or rather Median Parataceni of Greek geography (Strabo 11, 522; 15, 732; Herod. 1:101; Plin. 16:29), the A being prosthetic (as in Strabo, 15:764, Mardi and Amardi are interchanged). They, together with the Apharsites (q.v.), for whose name this would seem only another form, appear to have been some foreign tribe of Eastern Asia, conquered by the Assyrians, and removed (according to well-known usage, see  2 Kings 18:32 sq.) to another region for security and political extension. Ewald ( Isr. Gesch. 3, 375), following Gesenius, regards the name as only. another for the Persians, themselves, adopted out of hostility to the Jews (ib. p. 120), and in a three-fold form to enhance their own importance.

Kitto's Popular Cyclopedia of Biblial Literature [6]

Aphar´sachites or Apharsathchites, the name of the nation to which belonged one portion of the colonists whom the Assyrian king planted in Samaria ( Ezra 4:9;  Ezra 5:6).