The North Korean government has not publicly disclosed Kim Ju Ae's birth date. Ri Sol Ju's lengthy absence from the public eye in 2012 was later attributed to her pregnancy with Kim Ju Ae. South Korea's
National Intelligence Service (NIS) estimated in 2023 that she was 10 or 11 years old. South Korean lawmaker
Kim Byung-kee, citing "non-NIS sources", claims that she was born in 2013. His colleague Yi Wan-yong, citing both the NIS and non-NIS sources, claims that Kim Ju Ae has an older brother born in 2010 and a younger sibling of unknown sex born in 2017. The North Korean government has also not publicly disclosed her name, and the NIS has not verified any claims on the matter from
North Korean defectors. North Korean media initially called her Kim Jong Un's "beloved" () or "precious" () daughter but soon began using the adjective "respected" (), which is typically reserved for the most honoured members of North Korean society. For example, Kim Jong Un received the title of "respected comrade" shortly after becoming the country's supreme leader. The name "Ju Ae" was first mentioned by American basketball player
Dennis Rodman in his account of a 2013 visit he made to the North Korean capital of
Pyongyang. When discussing Kim Jong Un and Ri Sol Ju, Rodman described "[holding] their baby Ju Ae" and complimented Kim Jong Un as a "good dad" and an "awesome guy". However, Choe Su-yong, a former NIS intelligence officer, claims that Rodman misunderstood the Korean words (), which mean "that girl", and that the child's actual name is Un Ju (). Choe cited his North Korean informants as his source. Meanwhile, North Korean diplomat , who defected to South Korea in 2023, claims that her name is Ju Ye () and that
North Korean citizens named Ju Ye were ordered to change their names. == Public appearances ==