should be merged (both Hair Stylists)
and probably here too
http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng
and probably here too
http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng
and probaly here too?
http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng
and once more
http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

Could it be all hair-stylists called "linda" ???

Not sure here. Makeup artists and hairdressers usually use the artistic name of "Linda" or "Lin Dai" so maybe they are not the same person.