#3731 כַּפְתֹּר Kaphtor {kaf-tore'}
     or (Am. 9:7) כַּפְתּוֹר Kaphtowr {kaf-tore'}

 apparently the same as H3730; TWOT - 1028; n pr loc

—Hebrew Word Study (Transliteration-Pronunciation Etymology & Grammar)

 Caphtor = "a crown"
 1) the original home of the Philistines, perhaps on the southwest
    coast of Asia Minor, maybe in Egypt or close by, or more probably
    on the island of Crete
 2) (TWOT) the island of Crete, homeland or staging area of the
    Philistines

—Brown-Driver-Briggs (Old Testament Hebrew-English Lexicon)

—Strong's (Hebrew & Chaldee Dictionary of the Old Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - Caphtor 3; 3

—Exhaustive Concordance (KJV Translation Frequency & Location)