Yin Collection, Upper Volume
Radical: Child (zǐ)
孖
Kangxi stroke count: 6
Page 277, Entry 17
Guangyun (Broad Rhymes of the Guangyun): Pronounced zi.
Jiyun (General Rhymes of the Jiyun) and Leipian (Classified Chapters): Pronounced zi. The sound is like zi.
Yupian (Jade Chapters): Twins. Also written as a variant form (zi), meaning to multiply or grow.
Also, Guangyun and Jiyun: Pronounced zi (falling tone). The meaning is the same.