Jamieson, Fausset & Brown, on 1Chr 4:18

“And his wife Judaia, bore Jared the father of Gedor, and Heber the father of Socho, and Icuthiel the father of Zanoe. And these are the sons of Bethia the daughter of Pharao, whom Mered took to wife.”

“Jehudijah--"the Jewess," to distinguish her from his other wife, who was an Egyptian. This passage records a very interesting fact--the marriage of an Egyptian princess to a descendant of Caleb. The marriage must have taken place in the wilderness. The barriers of a different national language and national religion kept the Hebrews separate from the Egyptians; but they did not wholly prevent intimacies, and even occasional intermarriages between private individuals of the two nations. Before such unions, however, could be sanctioned, the Egyptian party must have renounced idolatry, and this daughter of Pharaoh, as appears from her name, had become a convert to the worship of the God of Israel.”

Imported from an open dataset — not yet checked against the printed edition.