General:

• Born April 8, 1990
• Height: 173 cm/5’7”
• Bloodtype: AB
• Hometown: Seoul
• Nicknames:
  Bling Bling Jonghyun (블링블링 종현)
  Jjong (쫑)
  Puppy (강아지 / gangaji)
  Puppy (멍멍이 / mungmungi)
  Dinosaur (공룡 / gongryong)

Past:
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• Jonghyun didn’t go to kindergarten. 
• When he was little, he on nectar in the flower beds in front of his parent’s record store
• He said that he like to make “ham sandwiches” when he was a kid. But at that time, he didn’t know what ‘ham’ was. His definition of a ham sandwich was a sandwich filled with chocolate M&Ms and some chili sauce, which he will then force his mother to eat.
• One time, he accidentally told a taxi driver the address to his old place. He was embarrassed so he didn’t correct himself and ended up getting off at his old place and took another taxi home. 
• Sometimes he will forget his home phone number or his parents’ phone number
• He went to a Christian high school, “Mount Zion.”
• Jonghyun was performing at the high school students’ celebration as the bassist of his band when SM saw his performance and selected him.
• His high school rock band’s name was “ZION”
• When Jonghyun was in his second year of junior high, he wanted a bass guitar so much that it even appeared in his dreams. One time, he dreamed that his dad bought him one. Perhaps the dream seemed too realistic, so when he woke up, he went to his dad and asked where his bass was. 
• Jonghyun was a happy kid in middle school that got along with everyone
• Since his class was small at his music school, he hugged every single person at least once.
• He sang R.Kelly’s 《I believe I can fly》 during his audition for SM
• During his trainee days, when Jonghyun sang badly, he would go to the upper floors and cry before coming back down. 
• Jonghyun would listen to music and sing loudly in the street. He didn’t care if people were staring at him. 
• He transferred from his high school to the Seoul Music Institute then dropped out. He later received his GED

Family:
(Mother, Father, Older sister)

• Jonghyun’s mom’s date of birth is March 1, 1967
• His mom currently operates a kindergarten 
• When Jonghyun was little, his parents owned a record store
• Jonghyun’s noona’s name is  Seodam
• Jonghyun’s sister studied English in Australia before
• According to Jonghyun, his father was “strict”
• When he was a kid and his father had to go overseas for a business trip, Jonghyun was reluctant and didn’t want him to go. So on the day of his dad’s departure, he stuffed A HUGE RAW FISH into the car’s engines so that the car wouldn’t work.
• His sister once cooked a dish that his whole family didn’t like, but Jonghyun ate the whole thing. 
• He bought his sister a MP3 once, and when his sister said it broke, he personally took it to get it repaired
• Besides music, Jonghyun’s biggest influence is family, particularly his mother. 
• About his mom he said, “She is always warm-hearted, strong-willed, and says what she thinks clearly to anyone.”
• When Jonghyun was in a band in high school, he had to hide it from his mom because he thought she wouldn’t like it. 
• When he was little, his  mom didn’t give him pocket money if he didn’t write book reports
• Both Jonghyun’s paternal and maternal grandmothers have passed away

source (c)