> when she migrated to US, she was <name> LNU (short for Last Name Unknown). Interesting! The loser of the previous World Chess Championship match was Russia'

> when she migrated to US, she was <name> LNU (short for Last Name Unknown). Interesting! The loser of the previous World Chess Championship match was Russia's Ian Nepomniachtchi. His last name means "one who doesn't remember [his last name]" -when asked by the Czar's census taker! I guess this kind of thing happens in many countries.