Jaehyun Facts:
– He was born in Seoul, South Korea
– Education: Seoul School of Performing Arts.
– His birth name is Jeong Jae Hyun, but he legalized to Jeong Yoon Oh (정윤오).
– His nicknames are: Casper, J, Jeffrey, WooJae, Peach boy, Jaeyuk, because he’s good at making meat (NCT Life in Seoul EP. 4), Valentine boy (birthday) 
– Jaehyun lived in Connecticut (USA) from when he was 5 till 10 years old.
– His English name is Jay. (When he studied in US, his teacher couldn’t pronounce his real name