Jewelry marked Danecraft and the C imposed over an F would have been made prior to the buyout in 1945. James Felch started another jewelry company after he left Danecraft, but it only operated a few years. Jewelry from this company may have been marked Felch. Victor Primavera, Sr. died in 1977.
Gad is another ordinary common noun in Hebrew. It means 'good luck'. We all want as much of it as we can get. So it is not surprising that it became a proper noun, the name of some people, a tribe of Israel, and a god. The god Gad was not ordinarily identified with Baal.
Gadi is a Hebrew form of the English, German, and Hebrew Gad. Forms of Gadi include the name Gaadi, the name Gad, the English and Hebrew Gaddi, the name Gaddy, the name Gadee, the name Gadie, the Hebrew Gadiel, and the name Gady. Gadi is a seldom used baby name for boys. It is not in the top 1000 names.