Yes, some iKON members have siblings. For example, Jay has an older sister who is six years older than him 🌟. Song also has a younger sister named Eunjin, who is known as an ulzzang 🌹. DK has a younger sister as well 🎀. Ju-ne has an older sister named Yeijin 🌺. Chan has an older brother 🚣.
Bobby has an older brother who is married, and he also has a younger sister 🎂. B.I, who used to be part of iKON, has a younger sister named Hanbyul, who is 15 years younger than him 🎁.
These siblings are part of the members’ families, and some of them have been mentioned in public appearances or interviews 📺.