Boyd’s Bible Dictionary:

(fruitful). (1) Son of Joktan, and his country in Arabia (Gen. 10:29). (2) Place whence the Hebrews drew gold, ivory, peacocks, and woods. Variously located (1 Kings 9:28; 10:11-22; 22:48; 1 Chron. 29:4; Job 28:16; Psa. 45:9).

Concise Bible Dictionary:

1. Son of Joktan, a descendant of Shem (Gen. 10:29; 1 Chron. 1:23). He is judged to have settled in Arabia.
2. Place from whence Solomon imported gold, precious stones, and almug trees. These were brought by ships to the Gulf of Akaba. Possibly southern Arabia is alluded to; but India and Africa have also been suggested (1 Kings 9:28; 1 Kings 10:11; 1 Kings 22:48; 1 Chron. 29:4; 2 Chron. 8:18; 2 Chron. 9:10; Job 22:24; Job 28:16; Psa. 45:9; Isa. 13:12).

Strong’s Dictionary of Hebrew Words:

or (shortened) pOphiyr {o-feer'}; and fOwphir {o- feer'}; of uncertain derivation; Ophir, the name of a son of Joktan, and of a gold region in the East
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

reducing to ashes

Potts’ Bible Proper Names:

Fatness; a fruitful region; ashes:―name of a person and of a region, Gen. 10:29. {Pinguedo}