In Eastern systems, it is quite natural to know from whom, and through whom, knowledge was received. This tradition is also part of Reiki. My Reiki training comes from this lineage:
Mikao Usui is the founder of Reiki. About 75 years ago, Hawayo Takata brought Reiki to the West. Paul Mitchell, together with Phyllis Furumoto, held the office of Grandmaster for the Reiki world. They work from the tradition of Usui Shiki Ryoho; freely translated: “the Usui System of Natural Healing”.