- International Certificate of Homeopathy, London College of Homeopathy, 1999, (Peter Chappell)
- Upon request, this is a list of those students, and colleagues of Abdul Hayy Holdijk, who, prior to establishment of H2RC2, completed their studies with the London College of Homeopathy in 1999. Many of these students have been practicing homeopathy for many years, as well as other alternative modes of healing, and have been instrumental in spreading homeopathy in Egypt and in the Middle East.
- Abdul Hayy Holdijk - I.C.H.
- Amira Snaith - I.C.H.
- Arlene Kuhlmann- I.C.H.
- Christina Abla - I.C.H.
- Dina Sid Ahmed - I.C.H.
- Eva Abdin - I.C.H.
- Hana Shams, D.D.S. - I.C.H.
- Hoda Zikry, M.D. (has since passed on) - I.C.H.
- Hugh Hughes - I.C.H.
- Janice Elwan - I.C.H.
- Kate George - I.C.H.
- Leslie Zehr - I.C.H.
- Maha Abu Taleb - I.C.H.
- Mahmoud Saeed, M.D. - I.C.H.
- Mona Mansour - I.C.H.
- Nazli Shafik- I.C.H.
- Pamela ? - I.C.H.
- Rana Jalabi - I.C.H.
- Ursula Willecke- I.C.H.
