Since Ginkgo managed to survive even in times of advanced human evolution (by that we mean period from befor two, three or more thousands of years) in only one smaller part of today's Southeast and East Asia (China, Japan, Korea and small circle aroun those countries) it is completely understandable that today's name Ginkgo has its base in languages that are native in that Area's.
Different plant and animal studies through history emerged classification through which it is possible to easier recognized individual plant or animal species, including Ginkgo.
As part of botany that deals with plant taxonoy and plant classification has developed through few last centuries it has brought out clearer scientificly based separations and grups in which Ginkgo is placed.
As Ginkgo arrived and settled in Europe and other parts of the World since people had no knowledge about this plant they named him in numerous names which they thouth it was appropriate no matter how strange in fact it was. But strange as it was in numerous countries it can be found in use even today.