PRODUCE X 101, debut group "example name" is Hot Topic in Korea.

● XX101 (double X101)

● 1 x 1 (one by one): 1 x 1 = 1

● x-boyfriend: former boyfriend

● X KOREA: aiming for "X JAPAN" in Korea

● WannaOne 2019: WannaOne's second visit

● X1 ZONE (size one): one size big and one size junior from IZONE

● X-one: Boy of unknown one

● BTX ‪: Taking advantage of BTS

● BTXO (Beetee Exo): Taking advantage of BTS and EXO

‪● Billboard X: How is Billboard ? ‬