According to HKFA they are the same person
http://ipac.hkfa.lcsd.gov.hk:81/ipac20/ ... 1@!horizon

http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng Gwan Yam
http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng Gwan Jing-Leung