Tsunami.
The 4-member group 2NE1 talked about the origins of their group name on Park Kyung Lim’s radio show.
They explained that some of the names that they considered were “Tsunami”, “Cool Chicks”, “Yang’s Children” and “YG Girls”. They said that the name “2NE1” only came up a few hours before the revealing of the groups names.
HAHAHAHAHAAHA! Tsunami and Yang’s Children are hilarious. lol.