Overview
These are our Aquarius babies 
. Some of the youngest Aquarius idols are Youngchae, Seoha (both of Coco) and Junghwan of TREASURE.
Both Youngchae, born on Jan 28 2008, and Seoha, born on Jan 29 2007, are the youngest female Aquarius idols and hail from the newly debut group Coco under Fancy Factory. Coco debuted on Jan 28 2019 (Youngchae's birthday!) with the single "Talk Talk".
Compare both Coco Aquarius members - Youngchae and Seoha
Junghwan or Prince Junghwan, born 18 Feb 2005, is the youngest Aquarius male idol and is a member of Treasure under YG Entertainment. Here's a compilation of cute Junghwan's earnest greetings below:
Compare TREASURE members - Junghwan and Haruto
Full Table of Aquarius babies below :
Interactive Table
More..
Special mention to J-Hope (Jung Ho Seok) of BTS who is born on 13 Feb 1994.
How' about a BTS side-by-side - J-Hope with Jungkook
Kangmin (Yoo Kangmin) is born on 25 Jan 2003 and is from VERIVERY under Jellyfish Entertainment.
Compare VERIVERY members - Kangmin with Minchan
Taehyun (Kang Tae Hyun) is born on 5 Feb 2002 and is from TXT under Big Hit Entertainment.
Compare TXT members - Taehyun with Huening Kai
BIG thanks to the information provided from the various websites (see our attribution sources). 
Here are other Aquarius idols I would like to feature.
Which idol is born under which Zodiac sign? Visit our idols of other Zodiac signs:
- Aquarius idols (Jan 20 - Feb 18)
- Pisces idols (Feb 19 - Mar 20)
- Aries idols (Mar 21 - Apr 19)
- Taurus idols (Apr 20 - May 20)
- Gemini idols (May 21 - Jun 20)
- Cancer idols (Jun 21 - Jul 22)
- Leo idols (Jul 23 - Aug 22)
- Virgo idols (Aug 23 - Sep 22)
- Libra idols (Sep 23 - Oct 22)
- Scorpio idols (Oct 23 - Nov 21)
- Sagittarius idols (Nov 22 - Dec 21)
- Capricorn idols (Dec 22 - Jan 19)
Have fun! 
Also, check out our full 2020 Compilation/Analysis of 1,903 K-Pop Idols (age, weight, height, zodiac, BMI, blood type and others).
Or visit our pre-ranked lists on these topics:
Heights - male idols, female idols
Weights - male idols, female idols
Age & Birthdays - male idols, female idols
Blood Type - male idols, female idols
Affiliations - agencies, most female idols, most male idols
Zodiacs - Aquarius, Aries, Cancer, Capricorn, Gemini, Leo, Libra, Pisces, Sagittarius, Scorpio, Taurus, Virgo
Birth Months - January, February, March, April, May, June, July, August, September, October, November, December