- Full name: Yoon Jeonghan
- Date of Birth: October 4, 1995
- Nationality: Korean
- Blood type: B
- Group: Seventeen
- Agency: Pledis Entertainment
- Debut: May 2015
- Position in the group: Sub vocalist
- Family members: Mom, dad, younger sister, Jeonghan
- Nickname: ‘Yoon angel’,’long hair guy’ and ‘Jjongjjong’
- He is good at sports and is strong
- Jeonghan has carsick
