But they're not. Neither was the Smith family. The Book of Mormon prophesy was bullshit. DNA evidence proves that.
"Gryffindor! No, WAIT... Ephraim!!"
And yet Mormons continue to claim lineage to the tribe of Ephraim. Isn't that a bit arrogant? How do Mormons expect anyone to take them seriously when they start spouting off about being Ephraimite? Just don't get your hopes up for an Israeli duel citizenship.