The orchid Vanda Poy Thong is a hybrid registered with the Royal Horticultural Society by Keeree in 1985.
Top three species ancestors and their influences are

• Vanda denisoniana (50.00%)  section: Obtusiloba 
• Vanda sanderiana (37.50%)  section: Roeblingiana 
• Vanda dearei (8.59%)  section: Deltoglossa