List of ONE Championship champions
Women

Division
Champion
Since
Defenses
MMA
MMA
MMA
MMA
Strawweight
China Jing Nan Xiong
20 January 2018 (ONE: Kings of Courage)
3
Atomweight
Singapore Angela Lee
6 May 2016 (ONE: Ascent to Power)
3
Kickboxing
Kickboxing
Kickboxing
Kickboxing
Atomweight
Thailand Stamp Fairtex
October 6, 2018 (ONE: Kingdom Of Heroes)
0
Muay Thai
Muay Thai
Muay Thai
Muay Thai
Atomweight
Thailand Stamp Fairtex
February 22, 2019 (ONE: Call To Greatness)
0

Question: In which year did Angela Lee win a ONE Women's Atomweight Title in MMA? 
Answer: In May 2016, Angela Lee won a ONE Women's Atomweight Title in MMA.