Not knowledgeable with regard to Don Jr & wife but Ivanka converted to Judaism when she married Jared Kushner......
Well aware. Hard to miss that often-cited fact in the news. Also, Eric's wife is Jewish, Lana was raised in North Carolina and her personality seems as much "southern girl" as anything else; but she and Eric did marry under a chuppah at Mar-a-Lago.
FYI, it’s a sin to point out someone converted to Judaism — proper to say they’re just Jews.